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Vladimir79 [104]
4 years ago
8

Please Help! image below

Mathematics
1 answer:
sweet-ann [11.9K]4 years ago
6 0

Answer:

A = 81π cm²

Step-by-step explanation:

The area (A) of the cross section is calculated as

A = πr² ( r is the radius )

Find r by using the given circumference.

Given the circumference is 18π and circumference (C) is

C = 2πr = 18π ( divide both sides by 2π )

r = 9, thus

A = π × 9² = 81π cm²

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8 0
4 years ago
If the radius is 12 what’s the diameter
noname [10]

Answer:

d=24 so the diameter is 24

Step-by-step explanation:

Let's solve your equation step-by-step.

d=(2)(12)

Step 1: Simplify both sides of the equation.

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Answer:

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7 0
3 years ago
The distance between Town A and Town B is 45 kilometers.
ololo11 [35]

Answer:

a)

0.8 hours

b)

1.1 kilometers/min

Step-by-step explanation:

a)

D = distance between town A and town B = 45 kilometers

v = speed of the train traveling from town A to town B = 60 kilometers per hour

t = time taken for the train to travel from town A to town B

Time taken is given as

t = D/v

inserting the values

t = 45/60

t = 0.8 hours


b)

D = distance between town A and town B = 45 kilometers

v = speed of the train traveling from town A to town B = ?

t = time taken for the train to travel from town A to town B = 40 minutes

Speed of the train is given as

v = D/t

inserting the values

v = 45/40

v = 1.1 kilometers/min

3 0
3 years ago
Read 2 more answers
Grace needs to buy a new printer. The printer she wants has a price tag of $60. She has a 25% off coupon and $50 in her bank acc
aleksklad [387]

Answer:

Yes, she will have $1.96 left

Step-by-step explanation:

Initial cost : $60

Discount : 25%=0.25

Calculating discount : 60 * 0.25 = 15

Calculating cost after discount : 60-15 = 45

Sales tax : 6.75%=0.0675

Calculating sales tax : 45 * 0.0675 = 3.0375≈$3.04

Calculating final cost : 45+ 3.04 = $48.04

Can she buy the printer : 50 - 48.04= $1.96

Answer : yes

7 0
3 years ago
Oliver downloaded 15 apps for her phone that altogether, used 2,806 MB of space. If each app used the same amount of space, abou
shepuryov [24]

Step-by-step explanation:

I guess the answer is 187MB

4 0
3 years ago
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