Last year austin, texas received 23.5 inches pf rainfall. this year austin received 21.2 inches of rainfall. find the percent of decrease in the number of inches in rainfall. round your answer to the nearest tenth of a percent, if necessary.
a. 2.3%
b. 9.8%
c. 10.8%
d. 13.6%

B. 9.8%

Step-by-step explanation:

Hi, to answer this question we have to use proportions

since 23.5 is the 100% = 23.5 inches /100 %

For 21.2 inches =21.2inches /x%

23.5/100 =21.2/x

Solving for x:

x = 21.2 / (23.5/100)

x = 90.2%

21.1 inches are 90.2% of 23.5 inches.

So, the percent decrease is:

100% - 90.21 % = 9.8 %

Feel free to ask for more if needed or if you did not understand something.

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

answer: do we write it

step-by-step explanation: