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Salsk061 [2.6K]
3 years ago
5

A math teacher graded 45 problems in

Mathematics
1 answer:
valina [46]3 years ago
5 0
75 problems
3/5 of an hours is 36 minutes you can then do 45 over 36 mins and set it equal to x over 60 mins then you do 45 times 60 which equals 2700 then you divide 2700 by 36 and you get 75
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A particle is moving along the curve y= 4sqrt(5x+11) . As the particle passes through the point (5,24) , its -coordinate increas
kupik [55]

The rate of change of the distance from the particle to the origin at this instant is 3 units per second.

<h3>What is the rate of change?</h3>

The instantaneous rate of change is the rate of change at a particular instant.

A particle is moving along the curve

y= 4\sqrt{5x+11} .

The rate of change of y is given as:

dy / dx = 2

by differentiating both sides,

\dfrac{dy}{dx} = 4\dfrac{1}{2\sqrt{5x+11} }  5\dfrac{dx}{dt} \\\\\dfrac{dy}{dx} = \dfrac{10}{\sqrt{5x+11} }\dfrac{dx}{dt}\\\\

From the question, we have:

(x, y) =  (5,24)

Substitute 5 for x and dy / dx = 2

\dfrac{dy}{dx} = \dfrac{10}{\sqrt{5x+11} }\dfrac{dx}{dt}\\\\\\5= \dfrac{10}{\sqrt{5(5)+11} }\dfrac{dx}{dt}\\\\\\\sqrt{5(5)+11} = 2\dfrac{dx}{dt}\\\\\\\dfrac{dx}{dt} = 6/ 2 = 3

Hence, the rate of change of the distance from the particle to the origin at this instant is 3 units per second.

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8 0
2 years ago
(Please help me quickly! Timed Quiz)
miv72 [106K]

A function assigns the values. The range of the function will be between (-∞,10].

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

The given function f(x)=10-x² is a parabolic function that is negative, therefore, will open downwards. Now, the range of the function can be found as,

f(x)=10-x²

y=10-x²

y-10 = -x²

-y+10 = x²

-y + 10 = 0

y = 10

Thus, the range of the function will be between (-∞,10].

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8 0
2 years ago
Please Answer! I have been working on this for an hour and can't get it!
Ronch [10]
The answer is B = (-1, -5)

Because -1 to 4 is 5 which is the run from
rise/run
So we would apply 2 - 7
Which would be - 5

Give me brainliest if this helped
7 0
3 years ago
The diameter of the circle is 8 cm. what is the circles area?
iren [92.7K]

Answer:

Step-by-step explanation:

diameter = 8 cm

radius = 8/2 = 4 cm

Area of circle = πr²

                       = 3.14*4*4 = 50.24 cm²

8 0
4 years ago
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A pipe is leaking and 1.5 cups per day about how many gallons per week is the pipe leaking
MatroZZZ [7]
The question asks per week. So 1.5 cups times 7 days is 10.5 cups. 

<span>The pipe leaks </span>10.5 cups<span> every week.</span>
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3 years ago
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