Is 50% a rational or irrational number

A Clark types 18 letters for staff members in one day this is 60% of the total number of letters he writes the whole day how many letters does he type in one day?

What two numbers can multiply to get + 15, however, add together to get - 9?

How many positive numbers from 1 to 999 have the sum of their digits equal to 8? For ex. the sum of digits in the numbers 62, 431, ... are equal to 8.

The diagram represents the circular floor under the dome of a state capitol building. The diameter is 40 ft. Find the circumference of the floor. Approximate as 3.14.

Round 6.21371192 to the nearest mile

Put in order least to Greatest. 2/3 0.5 5/9

Two poles of lengths 10 ft and 15 ft are set up vertically with their bases on horizontal ground 12 ft apart. Find the distance between the tops of the poles.

Write the equation of the circle: center at (0,0), diameter 18

When I count as a principal of $1000 and earns 4% simple interest per year and other account as a principal $1000 and earns 4% interest compounded annually which account has the greater balance at the end of four years

A craft vendor must sell at least $300 worth of merchandise to make a profit. Scarves sell for $10 each and hats sell for $20 each. She expects to sell at least 20 items. The lines on the graph represent the situation in which she makes a profit.