You wish to use a long string of random digits to randomly assign one-half of a group of 100 students to a treatment group. you assign consecutive number labels to all the students, starting with zero. you then break the long string into chunks of digits. should the chunks consist of single digits, pairs, triplets, or quadruplets?
a. quadruplets
b. pairs
c. single digits
d. triplets

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

Can someone me and plz do the problem

Explain how you can use the associative property to evaluate (7x50)x4.