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Maurinko [17]
3 years ago
11

What is the surface area of a sphere with a diameter of 89 cm? Round your answer to

Mathematics
1 answer:
MariettaO [177]3 years ago
7 0
≈24884.56cm²

Using the formulas
A=4πr2
d=2r
Solving forA
A=πd2=π·892≈24884.55541cm²
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What is 9 times 52 using mental math property
arsen [322]
Everyone works differently in mental meth.

To calculate 9*52, we note that 9=10-1, so mentally calculate
9(52)
=(10-1)(52)
=520-52   [ subtract 20 from each number]
=(520-20)-(52-20)  
=500-32
=468.

Alternatively,
9*52=9*50+9*2=450+18=468

If  you're good with multiplication and division,
9*52=3*3(52)=3*156=450+18=468


3 0
4 years ago
In complete sentences, explain how to determine the angle measurement for this angle.
djverab [1.8K]

Read it line by line and after 100 Read it 101 or 102 keep going until you reach the line easy

8 0
3 years ago
Read 2 more answers
A construction crew has just finished building a road. The road is 10 5/6 kilometers long. If the crew worked for 5 days, how ma
anygoal [31]

Answer:

Step-by-step explanation:

10 5/6 km...in 5 days

(10 5/6) / 5 =

(65/6) / 5 =

65/6 * 1/5 =

65/30 =

2 1/6 kilometers per day <===

6 0
4 years ago
Suppose that 16-ounce bags of chocolate chip cookies are produced with weights that follow a normal distribution with mean weigh
AysviL [449]

To solve this we use the z statistic. The formula for z score is:

z = (x – u) / s

where x is the sample value = less than 16, u is the sample mean = 16.1, s is standard dev = 0.1

 

z = (16 – 16.1) / 0.1

z = - 1

 

From the standard distribution tables at z = - 1,

P (z = -1) = 0.1587

 

<span>So about 15.87% is underweight.</span>

7 0
3 years ago
PLEASE HELP!!!!!!
kow [346]
A:93
B: slope

the slope is the rate of change of the line. this line models the distance between cop and the driver. note that the cop is standing still while the sports car is moving away at 93 mph

if the x-axis is in hours and the y-axis is in miles, then slope = rise/run = km/h, which is kilometers per hour. the slope is the rate of change of distance for the distance vs time graph

therefore the slope is 93 mph

7 0
3 years ago
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