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3 years ago

What is 3,130,649 rounded to the nearest hundred ?

1 answer:

7 0

When you need to round a number. First you need to look at the placement number that the question is asking to round to the nearest. In this case it's the nearest hundred.

3,130,649 the 6 is in the hundreds place. Now look to the number to the right of that number 3,130,649 that's the number that tells you if you will round up or down. If the number is 5 or more you round up, if it's less than 5 you round down.

In this case the 4 is less than 5 so you round down.

So your answer would be 3,130,600

Hope this helps. :)

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A model rocket is launched from the ground with an initial velocity of 160 ft/sec. how long will it take the rocket to reach its

timama [110]

The formula we need is
$h(t)=-16t^2+v_0 t+h_0$ , where v₀ is the starting velocity and h₀ is the initial height. Using the velocity and starting height from our problem we have
$h(t)=-16t^2+160t+0$ . The path of this rocket will be a downward facing parabola, so there will be a maximum. This maximum will be at the vertex of the graph. To find the vertex we start out with $x= \frac{-b}{2a}$ , which in our case is $x= \frac{-160}{2(-16)}= \frac{-160}{-32} = 5$ . It will take 5 seconds for the rocket to reach its maximum height. Plugging this back into our formula gives us
$h(5)=-16(5^2)+160(5)+0
\\=-16(25)+800
\\=-400+800=400$
The rocket's maximum height is 400 feet.
We set our formula equal to zero to find the time it takes to hit the ground, then we factor:
$0=-16t^2+160t+0
\\0=-16t^2+160t
\\0=-16t(t-10)$
Using the zero product property, we know that either -16t =0 or t-10=0. When -16t=0 is at t=0, when the rocket is launched. t-10=0 gives us an answer of t=10, so the rocket reaches the ground again at 10 seconds.

8 0

3 years ago

E ( y ) = β 0 + β 1 x 1 + β 2 x 2 + β 3 x 3

GenaCL600 [577]

Answer:

b.For each additional dollar paid to a tutor, we expect exam score to increase by 1.5 points, holding number of hours of sleep per week and number of study hours fixed.

Step-by-step explanation:

Hello!

For any multiple regression model, you can define the estimated slope as "the change or modification of the estimated average of Y when one of the explanatory variables increases one unit while the others remain constant.

In this example the dependant variable is:

Y: Exam score

And you have three explanatory variables:

X₁: salary of the teacher ($).

X₂: hours of sleep per week of a student.

X₃: number of study hours of a student.

The estimated model is ŷ= 65 + 1.5X₁ + 0.2X₂ + 0.5X₃

You need to interpret the estimated slope of the amount paid to the teacher b₁= 1.5

The units of the slope are units of Y by units of X, in this case, Y has no units so it is 1/$.

Then we can say that for every additional dollar paid to the teacher, the estimated mean score of the exam will increase by 1.5 1/$ while the weekly sleep hours and study hours remain constant.

I hope it helps!

5 0

3 years ago

0.2(x+50)-6=0.4(3x+20)

podryga [215]

Distrivute 0.2 to x and +50 and you get 0.2x+10-6 now for the other side we do the same and we get 1.2x+8 or an easier way... Let's solve your equation step-by-step.0.2(x+50)−6=0.4(3x+20)Step 1: Simplify both sides of the equation.0.2x+4=1.2x+8Step 2: Subtract 1.2x from both sides.0.2x+4−1.2x=1.2x+8−1.2x−x+4=8Step 3: Subtract 4 from both sides.−x+4−4=8−4 −x=4 now you divide by negative x (technically it is -1x=4 so your answer is x=-4

3 0

3 years ago

1) What is the product of 3,172 and 5?

marysya [2.9K]

Answer:

15860

Step-by-step explanation:

Calculator

7 0

3 years ago

Read 2 more answers

Two triangles are shown on the graph below. Which is a true statement about the triangles?

andriy [413]

Answer:

where the triangles are........????

4 0

3 years ago