How do i round this number to the tenths place? also how do i know when to round or not when rounding or rounding to the tenths place?

0.2

Step-by-step explanation:

0.206349 to the nearest tenth's place is 0.2.

Notice that what follows this 2 is 06349, which is clearly less than 50000.

If this is the case, we simply drop the 06349; but if the digits following 2 are 50000 or more, we round up.

So, as before, 0.206349 to the nearest tenth's place is 0.2.

                0.250000 would become 0.3 after rounding up.

                 0.263149 would become 0.3 after rounding up.

step-by-step explanation:

bob the banana

(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