Simplify the mathematical expressions to determine the product or quotient in scientific notation. Round so the first factor goes to the hundredths place. (4.5x104).(6.8x10–8) (2.8x102) (6.5x10-?) (5.6 x 10-3). (7.7 X 10-9) (8 x 10-2). (3.5 x 10-6) (7.4 x 10-5). (3.8 x 103) (9.3 x 10-4). (3.2 x 105) 1.82x10-4 → 3.06x10-3 9.45x10-4 1.54x10-4​

true !

step-by-step explanation:

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

yes the data was not prsented

step-by-step explanation: