3 years ago

Help me answer 1 - 24 plz

Mathematics

1 answer:

sladkih [1.3K]3 years ago

5 0

_23 it will be be a negative

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The radius of a car wheel is 14 inches. how many revolutions per minute is the wheel making when the car is traveling at 60 mph.

Dovator [93]

Answer:

$721\ \frac{rev}{min}$

Step-by-step explanation:

step 1

Find the circumference of the wheel

The circumference of a circle is equal to

$C=2\pi r$

we have

$r=14\ in$

substitute

$C=2\pi(14)$

$C=28\pi\ in$

assume

$\pi=3.14$

$C=28(3.14)=87.92\ in$

step 2

$1\ mile=63,360\ inches$

$1\ hour=60\ minutes$

we have that

The speed of the car is 60 miles/hour

Convert the speed to inches/minute

$60\ \frac{mi}{h}=60(\frac{63,360}{60})=63,360\ \frac{in}{min}$

step 3

Remember that

The circumference of the wheel subtends one revolution

$1\ rev=87.92\ in$

Convert the speed to rev/min

$63,360\ \frac{in}{min}=\frac{63,360}{87.92}=721\ \frac{rev}{min}$

3 0

3 years ago

Someone help me plizz

Naya [18.7K]

Answer:

Step-by-step explanation:

8 0

3 years ago

I dont think this is right

vodka [1.7K]

Use the Please Exuse My Dear Aunt Sally method. Add what's in the parentheses first. (30) times 3 (90) - 3 = 77 ! Wait actually you are correct! No mistakes here!

6 0

3 years ago

Amelia receives two dozens roses for her birthday. 18 of the roses are pink what percent of the roses are pink

ollegr [7]

18/24 = pink roses... 75% of the roses are pink.

4 0

3 years ago

P= 2L +2W, solve for W

s344n2d4d5 [400]

Answer: P

W= --- -L

6 0

3 years ago