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2 years ago

The car can carry 5 people. How many cars are needed to transport 50

Mathematics

1 answer:

irinina [24]2 years ago

6 0

Answer:

They would need to take 10 cars

Step-by-step explanation:

1 car=5 kid

2 cars=10 kid

3 cars= 15 kid

4 car=20 kids. and so on.

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If it take 10minutes to walk 1/2 of an mile how long will it take to walk how long will it take to walk 1 1/2 of an mile

Fantom [35]

Answer:

About 30 min.

Step-by-step explanation:

Since it takes 10 min to walk a half of mile, it will take 20 min to walk a whole mile.

Since we will be walking one and a half miles, it should take about 30 minutes.

Hope this helps.

6 0

2 years ago

Please help fast. It’s a test

Reil [10]

Were is the question?

6 0

3 years ago

Read 2 more answers

A circle is growing so that the radius is increasing at the rate of 3 cm/min. How fast is the area of the circle changing at the

Naya [18.7K]

Answer:

The area is growing at a rate of $\frac{dA}{dt} =226.2 \,\frac{cm^2}{min}$

Step-by-step explanation:

<em>Notice that this problem requires the use of implicit differentiation in related rates (some some calculus concepts to be understood), and not all middle school students cover such.</em>

We identify that the info given on the increasing rate of the circle's radius is 3 $\frac{cm}{min}$ and we identify such as the following differential rate:

$\frac{dr}{dt} = 3\,\frac{cm}{min}$

Our unknown is the rate at which the area (A) of the circle is growing under these circumstances,that is, we need to find $\frac{dA}{dt}$ .

So we look into a formula for the area (A) of a circle in terms of its radius (r), so as to have a way of connecting both quantities (A and r):

$A=\pi\,r^2$

We now apply the derivative operator with respect to time ( $\frac{d}{dt}$ ) to this equation, and use chain rule as we find the quadratic form of the radius:

$\frac{d}{dt} [A=\pi\,r^2]\\\frac{dA}{dt} =\pi\,*2*r*\frac{dr}{dt}$

Now we replace the known values of the rate at which the radius is growing ( $\frac{dr}{dt} = 3\,\frac{cm}{min}$ ), and also the value of the radius (r = 12 cm) at which we need to find he specific rate of change for the area :

$\frac{dA}{dt} =\pi\,*2*r*\frac{dr}{dt}\\\frac{dA}{dt} =\pi\,*2*(12\,cm)*(3\,\frac{cm}{min}) \\\frac{dA}{dt} =226.19467 \,\frac{cm^2}{min}\\$

which we can round to one decimal place as:

$\frac{dA}{dt} =226.2 \,\frac{cm^2}{min}$

4 0

3 years ago

Please help and thank you

vladimir2022 [97]

Answer: A & D

Explanation: When you multiply 15 and 4 and add that to 20 and 2 it would be 100. When you multiply 25 and 4 and add that to 25 and 2 it would be 150. Hope this helps :).

7 0

2 years ago

De geometría Cuanto es 3x+5

yuradex [85]

8 3+5 is 8 (ignore ejjeodkdjfjfjdkdjdnfjdjfjfjfjdjddjjdjdjdjdjddjjdjffkjfkfkfjfkfjfjf)

8 0

2 years ago