How does sqrt128 become 8sqrt2?

Hi, can someone please explain to me how sqrt (square root of)128 becomes 8sqrt2 ; or sqrt68 becomes 2sqrt17? ; or sqrt45 becomes 3sqrt5? Thank you

Functions with Postal Restriction

Postal Restrictions If a box with square cross section is to be sent by the postal service, there are restrictions on its size such that its Volume is given by V= x²(108-4x), where x is the length of each side of the cross section (in inches). (a) Is V a function of x? (b) If V= V(x), find V(10) and V(20). (c) What restr ...continues

Postal Restrictions

Postal Restrictions If a box with square cross section is to be sent by the postal service, there are restrictions on its size such that its Volume is given by V= x²(108-4x), where x ist the length of each side of the cross section (in inches). (a) Is V a function of x? (b) If V= V(x), find V(10) and V(20). (c) What rest ...continues

Math word problem (brooms)

An invoice for 17 brooms and 22 mops totaled 211.84. Another invoice for 20 brooms and 14 mops totaled 191.00 How much did each broom cost, and how much did each mop cost(to the nearest cent)?

Calculating circumference

A circular well is 5 feet in diameter. What is the circumference of the circular plastic cover that fits exactly over the well (to the nearest hunderedth)

Math word problem

You went on a diet and lost 15% of your body weight. You currently weigh 167 lbs what was your pre-diet weight (to the nearest pound).

Math word problem

You went on a diet and lost 15% of your body weight. you currently weigh 167 lbs. what was your pre-diet weight (to the nearest tenth of a pound)?

Word Problem

What o'clock is it when the time from noon is 9/11 of the time to midnight?

Rearrange formula

rearrange i=3e^-0.36t to make t=1/0.36 log e(3/i)

Simultaneous Equations

State whether the following system of equations is solvable or unsolvable. If it is solvable, find the solution. 3(y-1) = 2(x-3) 3> y-2x = -3