1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Artyom0805 [142]
3 years ago
14

The graph shown corresponds to someone who makes

Mathematics
1 answer:
marusya05 [52]3 years ago
8 0

Answer:

Very

Step-by-step explanation:

You might be interested in
In the first two hours of the trip, Julissa drove 120 miles. In the next hour, she traveled only 48 miles. What was Julissa’s av
viktelen [127]

Answer:

Jane drives at an average speed of 45 mph on a journey of 135 miles. How long ... by speed. 135 miles ÷ 45 mph = 3 hours ... of 8 mph. If he cycles for 6½ hours, how far does he travel? ... in 4 hours. (a) What is her average speed for the first part of the journey? ... (a) What is average speed of the car in miles per hour? mph.

Step-by-step explanation:

7 0
3 years ago
A competitive diver dives from a 33-foot high diving board. The height of the diver in feet after 't' seconds is given by u(t) =
ludmilkaskok [199]

Answer:

t  = 0.375s

Step-by-step explanation:

Given

h(t) = -16t^2 + 4t + 33 --- driver 1

Rate = 2ft/s -- driver 2

height = 33ft

Required

The time they passed each other

First, we determine the function of driver 2.

We have that:

Rate = 2ft/s and height = 33ft

So, the function is:

h_2(t) = Height - Rate * t

h_2(t) = 33 - 2t

The time they drive pass each other is calculated as:

h(t) = h_2(t)

-16t^2 + 4t + 33= 33 - 2t

Collect like terms

-16t^2 + 4t + 2t= 33 - 33

-16t^2 + 6t= 0

Divide through by 2t

-8t + 3= 0

Solve for -8t

-8t  = -3

Solve for t

t  = \frac{-3}{-8}

t  = 0.375s

7 0
3 years ago
Can someone help its due soon
Pani-rosa [81]

Answer:

x=43

Step-by-step explanation:

80+65=145

a quadrilateral has 360 degrees

360-145=215 degrees left

3x+2x=5x

5x=215 degrees (divide by 5)

x=42

PLEASE GIVE ME BRAINLIEST!!<3

7 0
3 years ago
A tank with a capacity of 500 gal originally contains 200 gal of water with 100 lb of salt in the solution. Water containing1 lb
devlian [24]

Answer:

(a) The amount of salt in the tank at any time prior to the instant when the solution begins to overflow is \left(1-\frac{4000000}{\left(200+t\right)^3}\right)\left(200+t\right).

(b) The concentration (in lbs per gallon) when it is at the point of overflowing is \frac{121}{125}\:\frac{lb}{gal}.

(c) The theoretical limiting concentration if the tank has infinite capacity is 1\:\frac{lb}{gal}.

Step-by-step explanation:

This is a mixing problem. In these problems we will start with a substance that is dissolved in a liquid. Liquid will be entering and leaving a holding tank. The liquid entering the tank may or may not contain more of the substance dissolved in it. Liquid leaving the tank will of course contain the substance dissolved in it. If <em>Q(t)</em> gives the amount of the substance dissolved in the liquid in the tank at any time t we want to develop a differential equation that, when solved, will give us an expression for <em>Q(t)</em>.

The main equation that we’ll be using to model this situation is:

Rate of change of <em>Q(t)</em> = Rate at which <em>Q(t)</em> enters the tank – Rate at which <em>Q(t)</em> exits the tank

where,

Rate at which <em>Q(t)</em> enters the tank = (flow rate of liquid entering) x (concentration of substance in liquid entering)

Rate at which <em>Q(t)</em> exits the tank = (flow rate of liquid exiting) x (concentration of substance in liquid exiting)

Let C be the concentration of salt water solution in the tank (in \frac{lb}{gal}) and t the time (in minutes).

Since the solution being pumped in has concentration 1 \:\frac{lb}{gal} and it is being pumped in at a rate of 3 \:\frac{gal}{min}, this tells us that the rate of the salt entering the tank is

1 \:\frac{lb}{gal} \cdot 3 \:\frac{gal}{min}=3\:\frac{lb}{min}

But this describes the amount of salt entering the system. We need the concentration. To get this, we need to divide the amount of salt entering the tank by the volume of water already in the tank.

V(t) is the volume of brine in the tank at time t. To find it we know that at t = 0 there were 200 gallons, 3 gallons are added and 2 are drained, and the net increase is 1 gallons per second. So,

V(t)=200+t

Therefore,

The rate at which C(t) enters the tank is

\frac{3}{200+t}

The rate of the amount of salt leaving the tank is

C\:\frac{lb}{gal} \cdot 2 \:\frac{gal}{min}+C\:\frac{lb}{gal} \cdot 1\:\frac{gal}{min}=3C\:\frac{lb}{min}

and the rate at which C(t) exits the tank is

\frac{3C}{200+t}

Plugging this information in the main equation, our differential equation model is:

\frac{dC}{dt} =\frac{3}{200+t}-\frac{3C}{200+t}

Since we are told that the tank starts out with 200 gal of solution, containing 100 lb of salt, the initial concentration is

\frac{100 \:lb}{200 \:gal} =0.5\frac{\:lb}{\:gal}

Next, we solve the initial value problem

\frac{dC}{dt} =\frac{3-3C}{200+t}, \quad C(0)=\frac{1}{2}

\frac{dC}{dt} =\frac{3-3C}{200+t}\\\\\frac{dC}{3-3C} =\frac{dt}{200+t} \\\\\int \frac{dC}{3-3C} =\int\frac{dt}{200+t} \\\\-\frac{1}{3}\ln \left|3-3C\right|=\ln \left|200+t\right|+D\\\\

We solve for C(t)

C(t)=1+D(200+t)^{-3}

D is the constant of integration, to find it we use the initial condition C(0)=\frac{1}{2}

C(0)=1+D(200+0)^{-3}\\\frac{1}{2} =1+D(200+0)^{-3}\\D=-4000000

So the concentration of the solution in the tank at any time t (before the tank overflows) is

C(t)=1-4000000(200+t)^{-3}

(a) The amount of salt in the tank at any time prior to the instant when the solution begins to overflow is just the concentration of the solution times its volume

(1-4000000(200+t)^{-3})(200+t)\\\left(1-\frac{4000000}{\left(200+t\right)^3}\right)\left(200+t\right)

(b) Since the tank can hold 500 gallons, it will begin to overflow when the volume is exactly 500 gal.  We noticed before that the volume of the solution at time t is V(t)=200+t. Solving the equation

200+t=500\\t=300

tells us that the tank will begin to overflow at 300 minutes. Thus the concentration at that time is

C(300)=1-4000000(200+300)^{-3}\\\\C(300)= \frac{121}{125}\:\frac{lb}{gal}

(c) If the tank had infinite capacity the concentration would then converge to,

\lim_{t \to \infty} C(t)=  \lim_{t \to \infty} 1-4000000\left(200+t\right)^{-3}\\\\\lim _{t\to \infty \:}\left(1\right)-\lim _{t\to \infty \:}\left(4000000\left(200+t\right)^{-3}\right)\\\\1-0\\\\1

The theoretical limiting concentration if the tank has infinite capacity is 1\:\frac{lb}{gal}

4 0
3 years ago
The store bought a pair of shoes for $50, and sold it for $80.What percentage was the mark up
Charra [1.4K]
30% percent is what they marked up
6 0
3 years ago
Other questions:
  • I need to find the derivative of this equation
    12·1 answer
  • The variables x and y vary directly. Use the values to find the constant of proportionality. Then write an equation that relates
    9·1 answer
  • An integral equation is an equation that contains an unknown function y(x) and an integral that involves y(x). Solve the given i
    15·1 answer
  • You are selecting meals for a school event and you are planning on at least 240 students at this event. The chicken meal will co
    12·1 answer
  • 7/9−1/4<br> i need a answer now
    8·2 answers
  • Easy 10 points<br><br>10*1=​
    6·2 answers
  • Consider the figure below. Which congruence transformation maps ABCD to A"B"C"D"?
    6·2 answers
  • Point 0,4 and slope 1/10 equation in slope intercept form
    15·1 answer
  • If two sides of a triangle measure 18 centimeters and 22 centimeters what could be the measure of the third side
    5·1 answer
  • Find the perimeter of the triangle whose vertices are (−7,−1), (5,−1), and (5,4). Write the exact answer. Do not round.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!