Frank is painting some fencing. After 1/2 hour, he has painted 3 1/4 feet of fencing. What is the rate, in feet per hour, at which she is painting? Express your answer as a mixed number.

6.5/1 = 6 1/2 as a mixed number

Step-by-step explanation:

3.25/0.5  - he paints 3.25 feet of fencing in 30 mins

so in an hour he paints 6.5 feet

6.5/1

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18. g

20. h 30 degree turn.

21. d 90 degree angles

and also 19 is a. a sphere not a cirlcle

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a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.