Over a 20-year period, a certain city recorded a total rainfall of 621 inches. the rainfall during this past year was 28 inches. if the variable r stands for the total amount of rain for the other 19 years, which of the following would be a reasonable value for this variable? a. 30 inches b. 100 inches c. 600 inches d. 700 inches

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

What is another way to express 36 +32

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.