Which value must be added to the expression x^2 + 16x to make it perfect-square trinomial?

A-8

B-32

C-64

D-256

Edit: it's not A

Germany flag has a heigh to length ratio 3:5 if German flag is 30 feet what is its height

A rectangle has an area of 56 square centimeters it's length is 8 centimeters what's the width

An ant has 6 legs how many legs do 8 arts have

The function h (t) = - 16t^2 + 16t represets the height (in feet) of a horse t seconds after it jumps during a steeplechase. At what time does the horse reach its maximum height in seconds (write as a decimal) ? seconds

What integer represents a loss of 15 yards in football?

What is 950,000,000 in scientific notation?

6,8,10,12 arithmetic or geometric

There is a number, which has five digits 5abc9. If this number is the square of an integer, where a, b, c each represent a missing digit and all five digits are different, then find this number.

Andy's backpack weighs 2 1⁄4 pounds. If he removes a book that weighs 13 ounces, how much does the backpack now weigh?

Amy can run 1/10 mile per minute. How many minutes will it twke Amy to run 3 miles?