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3 years ago

the ferris wheel makes 12 revolutions per ride how far would someone travel during one ride. the diameter is 63 feet

Mathematics

2 answers:

Elan Coil [88]3 years ago

6 0

Using the formula for circumference from diameter (c=pi(d)), we find that the circumference of the ferris wheel is about 197.97 feet. We then multiply that number by the revolutions to get 2,374.64 feet, which is the answer.

NeX [460]3 years ago

4 0

You are actually calculating "arc length." The formula for that is s=r times theta,
where s is the arc length or distance traveled in a circle, and theta is the central angle (always in radians, never in degrees).

Actually, you could obtain the same result by using the formula for circumference of a circle. The distance around the wheel is 2 pi r, where r is the radius and is one half of the given diameter. calculate this circumference / distance, and then multiply your result by 2.

Note that your final answer MUST include units of measurement (of distance).

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3 years ago

Sarah answered 24 questions on her test correctly and earned an 80%. How many questions were on the test?

MaRussiya [10]

Answer:

43 questions in total

Step-by-step explanation:

the original equation with the unknown (total number of questions on the test) will look like this

$\frac{total \: number \: of \: questions \: on \: exam}{24 \: answered \: questions} = 80\%$

we know this because to work out a percentage in the 1st place you need the total ÷ number (in this case it's ÷ how many questions out of the total she did answer)

now you rearrange.

you need to move the 24 to get the total on it's own here's how you do it

$\frac{tot \: num \: of \: qs}{24} \times 24 = 80\% \times 24$

what you do to one side of equation you have to do to the other. the 24 and 24 on the left will cancel because 24÷24=1 and we don't write

got mum of Q's x 1= 80 x 24

now you convert % to decimal

$80\% \times 100 = 0.80$

replace

$tot \: num \: qs \: = 24 \times 0.80 = 19$

now you take the original and + the 19

$24 + 19 = 43$

therefore there are a total of 43 questions on the exam

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3 years ago

A) Complete the table of values for x + 2y = 7

Marrrta [24]

The values for y are as follows
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2 years ago

Read 2 more answers

Lance and 7 other friends go to an activity center together. They each pay $5.95 for dinner, $4 for laser tag, $3.60 for bowling

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