Which phrase describes an unknown or changeable quantity? a. 60 seconds multiplied by 5
b. 3 dollars and 76 cents
c. 2 times the number of pages in a book
d. 15 years of schooling

c. 2 times the number of pages in a book.

Step-by-step explanation:

this would be represented by 2n.

We do not know how many pages there are.

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation:

mariah is studying the life cycle of the monarch butterfly. she must choose one stage in the cycle to present in science class: egg, caterpillar, chrysalis, or adult. she plans to make her choice randomly using a custom spinner divided into four sections. first, however, she spins the spinner 50 times to see the frequencies it generates.

stage times landed on

egg 10

caterpillar 12

chrysalis 15

adult 13

step-by-step explanation: