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3 years ago

*TIME(65 MILES PER HOUR)," "TIME(65)," and "T(65)" all represent which of

Mathematics

1 answer:

lara31 [8.8K]3 years ago

4 0

Answer: A. The distance traveled at 65 miles per hour for a certain amount of time.

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

Speed rate = distance/ time

Isolating distance:

Distance = speed rate x time

So, the time (T) multiplied by the speed rate (65) represents the distance traveled at 65 miles per hour for a certain amount of time.

In conclusion, the correct option is A.

Feel free to ask for more if needed or if you did not understand something.

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kkurt [141]

3 or 4 because if you add 1000 and 1500,1175 and 1200.

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3 years ago

webassign If a snowball melts so that its surface area decreases at a rate of 6 cm2/min, find the rate at which the diameter dec

drek231 [11]

Answer:

The answer is $\frac{3}{10\pi } cm/min$

Step-by-step explanation:

Assuming the snowball is a perfect sphere, then if A denotes the surface area and D the diameter then:

$A=4\pi r^{2} = 4\pi (\frac{D}{2} )^{2} =\pi D^{2}$

Differentiating wrt r we have:

$\frac{dA}{dD} =2\pi D$

We are told that $\frac{dA}{dt}= -6$ and we want to find $\frac{dD}{dt}$

By the chain rule we have:

$\frac{dA}{dD}=\frac{dA}{dt}.\frac{dt}{dD}=\frac{\frac{dA}{dt} }{\frac{dD}{dt} }$

∴ $2\pi D=-\frac{6}{\frac{dD}{dt} }$

∴ $\frac{dD}{dt}=-\frac{6}{2\pi D}$

When D=10 then

$\frac{dD}{dt} =-\frac{6}{10*2\pi } =-\frac{3}{10\pi }$

The sign (-) shows that the D is decreasing.

3 0

3 years ago

Fill in the blank with a constant, so that the resulting expression can be factored as the product of two linear expressions: 2a

sdas [7]

Answer:

-15

Step-by-step explanation:

We proceed as follows;

In this question, we want to fill in the blank so that we can have the resulting expression expressed as the product of two different linear expressions.

Now, what to do here is that, when we factor the first two expressions, we need the same kind of expression to be present in the second bracket.

Thus, we have;

2a(b-3) + 5b + _

Now, putting -15 will give us the same expression in the first bracket and this gives us the following;

2a(b-3) + 5b-15

2a(b-3) + 5(b-3)

So we can have ; (2a+5)(b-3)

Hence the constant used is -15

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3 years ago

Maria spend 5 hours studying and earned a 90 on her exam. If you want to score a 81, how much time do you need to spend studying

Oliga [24]

Answer:

4hrs 30 mins

Step-by-step explanation:

5hrs-90

x-81

cross multiplying gives us

405-90x then dividing through made x=4.5 which is = 4hrs 30mins

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3 years ago

Convert y=8x +5 to point slope form

Luba_88 [7]

Answers: m = 8

Step-by-step explanation:

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3 years ago

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