Can someone please help this is due tonight!!

see explanation

Step-by-step explanation:

The wheel has a measure of 360° , thus

360° ÷ 20 ( number of cars on the wheel )

= 18° ← central angle

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arc length is calculated as

arc = circumference of wheel × fraction of wheel

      = 2πr ×

      = 2π × 25 × = ≈ 7.85 ft

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area of sector is calculated as

area = area of wheel × fraction of wheel

        = π × 25² × = ≈ 98.17 ft²

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours