Question

Which of the following is the most appropriate unit to describe the time you can drive a car based on the amount of gas?

Minutes per gallon, because the independent quantity is the gallons
Minutes per gallon, because the independent quantity is the minutes
Gallons per minute, because the independent quantity is the gallons
Gallons per minute, because the independent quantity is the minutes

Answer 1

can someone please help

Answer 2

Let's figure out which one is independent first. The independent one does not depend on the other one

Which one makes more sense

The number of minutes I drive depends on the number of gallons

or

The numbers of gallons I have depends on the number of minutes I drive

Answer 3

the first one

Answer 4

right

Answer 5

It would be the second one, actually

Answer 6

oh lol ok

Answer 7

thanks

Answer 8

So you know if it's A, B, C, or D?

Answer 9

b

Answer 10

right or something else

Answer 11

Not exactly, because minutes isn't independent

For example, let's say you have a 50 gallon tank

Because you have 50 gallons, that doesn't mean you have to drive for 50 minutes. You could drive for 20 minutes if you wanted.

Buttt... if you wanted to drive for 50 minutes, you must have a certain amount of gallons, since minutes depend on the gallons, making gallons independent

Answer 12

ok

Answer 13

so not b but d

Answer 14

Right, so we're down to A and C

Would you say "My car uses up 2 gallons per 100 minutes of driving"

or

"My car uses up 100 minutes of driving per 2 gallons"

Answer 15

THE FIRST ONE!!!?!?

Answer 16

Lol yep

Answer 17

Thanks a bunch

Answer 18

No problem, anytime!

Answer 19

oh can you help me with one more

Answer 20

Sure

Answer 21

A rectangle has a length of 9.00 inches and a width of 4.25 inches. What is the area in square inches? Round to the correct significant digits.

Answer 22

If I said the formula for the Area of a rectangle is Length x Width, would you know how to find it?

Answer 23

yea

Answer 24

so just multiply

Answer 25

Right, that's the first part of this.

What would you get?

Answer 26

38.25

Answer 27

Correct!
Now significant digits. Significant digits is basically putting your answer in the least amount of numbers, according to what the problem gives you:

Examples:

3.12334 and 2.4154233

The first number has 6 total digits and the second has 8 total digits, so your answer should only have 6 digits, since that's the lower number

One more:

4.56 and 6.78

Both of these have 3 total digits, so the answer will also need 3.



Now, for our problem we have 9,00 and 4,25. How many digits should the final answer be in?