Which expressions are differences of squares?

Select each correct answer.

A: t^2-1

B: k^2+81

C: n^2-225

D: p^2-40

Bill wants to post three parcels. Parcel 1 Parcal 2 Parcel 3 Each parcel costs £1.10 to post. How much change should he get from a £10 note?

1. Is 435 evenly divisible by 5? Circle: Yes or No

Elton opened a compound interest savings account with $5500 in principal and an interest rate of 2.8%. If interest is compounded quarterly, how much is in the account after 4 years? interest compounded quarterly: A = P (1 + r/4) 4t A. $6149.42 B.

The weights of certain machine components are normally distributed with a mean of 8.5 g and a standard deviation of 0.09 g. Find the two weights that separate the top 3% and the bottom 3%.

Muna has a piece of string that is 4 2/3 yards long. If she cuts it into pieces that are each 2/3 yard long, how many pieces of string will she have.

The admission cost for a student to the Frontier Culture Museum is $6.00. If 101 students are attending, what will the total cost be for tickets?

What is Y squared plus 5Y plus 2Y squared minus 4Y

What does a computer do when it's hungry

Brandie is trying to decide between two cell phones. One is free with a 2-year contract, but she will have to pay the sales tax of 8% on the original price$399 and the monthly charge is $10 more than she currently pays.

If the length of side a is 16 centimeters, the length of side b is 10 centimeters, and m = 42°, what is the measure of? Round your answer to two decimal places.