How many ways are there to choose a dozen donuts from 21 varieties?

In 2014, a marketing firm collected survey data by asking respondents: "Do you trust consumer opinions posted online?" Of 350 surveyed, 238 said yes. Construct a 95% confidence interval.

The average cost of 5 kits was $9.50. The first kit costs $11.25, the second kit cost $8.75, the third kit cost $9.35, and the fourth kit cost $8.90. Find the cost of the fifth kit

7/10 minus 3/5 does it equal to 1/10

Hannah buys 3 packages of 36 exposure film and 2 packs of 24 exposure film. How many rolls does she have left? A. 8, b. 12 c. 20, or d. 24

Julius has a garden that has dimensions of 12 ft by 20 ft. Julius needs more room to plant some peppers, and determines the garden will need a new area of 360 square feet.

For a field trip 29 students rode in cars and the rest filled 6 buses. How many students were in each bus if 323 students were on the trip.

Sandra read 5 books, Deacon read 6 books, and Breanna read 7 books. One book was read By all 3 children, but every other book was different. How many different books did the children read?

A circle has a diameter of 17 inches. What is the circumference?

How long does it take a snail to crawl 1440 inches if it crawls 60 inches per minute?

Simplify the following expression. (4+2i) divided by (1+i)