Question 1 A printer prints 28 photos in 8 minutes.

a. How many minutes does it take to print 21 more photos?

It will take 73.5 minutes to print 21 more photos.

Step-by-step explanation:

The printer can print 28/8 or 3.5 photos per minute, so it can print 21 photos in 21*3.5 = 73.5 minutes.

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

step-by-step explanation: