In how many ways can Anna arrange 2 math books, 3 physics books, and 5 chemistry books on her shelf if all books of the same subject must be adjacent? (The books are distinguishable.)

Step-by-step explanation:

Arranging the books of each subject:

Math:

Physics:

Chemistry:

We also need to consider the subjects.

There are 3 subjects, kept separately, they will be arranged in 3! = 6 ways

So the total number of combinations is:

Hence, total ways are (2×6×120×6) ways =8640 ways.

x = 25

step-by-step explanation:

a^2+b^2=c^2

7^2+24^2=c^2

49+576=625

sqrt625=25

x=25

john earns $14.00 for two hours of work.