Question

A drought can cause the level of the local water supply to drop by a few inches each week.Suppose the level of the water supply drops 2.8 inches each week

A. how far will it have dropped in 4 weeks.
B. How far will it have dropped in 6 half weeks
C. Create another real world situation which is not a water supply drought,using the numbers -2.8 and 4.
its multiplying rational numbers

Answer 1

@kewlgeek555

Answer 2

@mathstudent55

Answer 3

@mathaholic

Answer 4

@TuringTest

Answer 5

If the water level drops 2.8 inches in 1 week, then you can construct the table below:

Week Water drop
1 2.8 = 1 * 2.8 = 2.8
2 2.8 + 2.8 = 2 * 2.8 = 5.6
3 5.6 + 2.8 = 2.8 + 2.8 + 2.8 = 3 * 2.8 = 8.4
4 8.4 + 2.8 = 2.8 + 2.8 + 2.8 + 2.8 = 4 * 2.8 = 11.2

You see that part A is a multiplication problem. The water level drops 2.8 inches in 1 week, so to find how much it drops in any number of weeks, multiply the number of weeks by 2.8.

Answer 6

For part B, all you need to do is multiply the number of weeks by the drop, 2.8. First, how many weeks is 6 half weeks? Figure that out then multiply it by 2.8.

Answer 7

What about C

Answer 8

@mathstudent55

Answer 9

@Euler271