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lutik1710 [3]
3 years ago
6

Find the surface area of the sphere.

Mathematics
1 answer:
Mila [183]3 years ago
6 0

A = 201.1\:\text{cm}^2

Step-by-step explanation:

Given: r = 4 cm

The surface area A of a sphere is given by

A = 4\pi r^2 = 4\pi(4\:\text{cm})^2

\:\:\:\:\:= 201.1\:\text{cm}^2

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30 Pts
Alona [7]

How to find the percent of change between numbers


First: work out the difference (increase) between the two numbers you are comparing.


Increase = New Number - Original Number


Then:  divide the increase by the original number and multiply the answer by 100.


% increase = Increase ÷ Original Number × 100.


If your answer is a negative number, then this is a percentage decrease.


To calculate percentage decrease:

First: work out the difference (decrease) between the two numbers you are comparing.


Decrease = Original Number - New Number


Then: divide the decrease by the original number and multiply the answer by 100.\


% Decrease = Decrease ÷ Original Number × 100


If your answer is a negative number then this is a percentage increase.


If you wish to calculate the percentage increase or decrease of several numbers then we recommend using the first formula. Positive values indicate a percentage increase whereas negative values indicate percentage decrease.

The answer is 24.22%


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8 0
3 years ago
laurens suv was detected exceeding the posted speed limit of 60 kilometers per hour , how many kilometers would she have been tr
Vlada [557]

Answer:

60 kilometers per hour (kmph) over the limit

Step-by-step explanation:

The speed limit is 60 kmph

Let's find his original rate:

We know D = RT

Where

D is the distance, in km

R is the rate, in kmph

T is the time in hours

He went 10 km in 5 minutes, so we need the time in hours, first. That would be:

5/60 = 1/12 hour

So, putting into formula, we find rate:

D = RT

10 = R(1/12)

R = 10/(1/12)

R = 10 * 12

R = 120 kmph

He was going over by:

120 - 60 = 60 kmph

6 0
3 years ago
Which two substances bind using a lock-and-key mechanism?
kherson [118]

Answer:

enzyme and substrate. reactant and substrate. substrate and product.

Step-by-step explanation:

4 0
3 years ago
How many times can 224 go into 1400?
marshall27 [118]
Its 1400 divided by 224 so it will be 6.25 times

8 0
3 years ago
Please help name brainliest
kvasek [131]

Answer:

20 days

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
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