Which operations are the most efficient to use to solve the problem and what is the solution? the jackson neighborhood has a community garden that has an area of 672 square yards. the width of the garden is 21 yards. the length of the nguyen neighborhood garden is 15 yards longer than the length of the jackson garden. what is the length of the nguyen neighborhood garden? choose exactly two answers that are correct.
a. division and addition
b. multiplication and addition
c. 330 yds
d. 47 yds

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0

Agroup of three friends order a combo meal which includes two slices of pizza and a drink each drink is priced at $2.50 the combined total of $31.50 how much is the cost of a slice of pizza