Andrew was making a science project for school. He worked for 6.6 hours the first week, 2.75 hours the second week, and 4.4 hours the third week. Andrew used the following mental math strategy to find the total number of hours he worked on his project.

6
.
6
+
2
.
75
+
4
.
4
(
6
.
6
+
4
.
4
)
+
2
.
75

11
+
2
.
75
=
13
.
75

What is the reason for his strategy?

A.
It is easier to add decimals in a decreasing order than in a mixed order.

B.
6.6 and 4.4 are compatible numbers that are easy to add mentally.

C.
It is easier to add decimals with the same number of place values after the decimal point than adding decimals with different numbers of place values after the decimal point..

D.
Rounding removes the decimals and creates whole numbers.

The amount of money, in dollars, in an account after t years is given by a = 1000(1.03)^t. the initial deposit into the account was $_^a0 and the interest rate was _a1% per year. only enter numbers in the boxes. do not include any commas or decimal points^t. the initial deposit into the account was $__^a0 and the interest rate is % per year.

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles

The accompanying table shows the numbers of male and female students in a particular country who received bachelor's degrees in business in a recent year. complete parts (a) and (b) below. business degrees nonbusiness degrees total male 189131 634650 823781 female 169539 885329 1054868 total 358670 1519979 1878649 (a) find the probability that a randomly selected student is male, given that the student received a business degree. the probability that a randomly selected student is male, given that the student received a business degree, is nothing. (round to three decimal places as needed.) (b) find the probability that a randomly selected student received a business degree, given that the student is female. the probability that a randomly selected student received a business degree, given that the student is female, is nothing. (round to three decimal places as needed.)