Idon’t get this at all! how do you find circumference from area, vice versa? me! you so much!

about 30.16

Step-by-step explanation:

Break down the area by dividing by pi, then using the square root of that answer, which is the radius

Then plug it in to the circumference formula [2pi(radius)]

c=30.162977

Step-by-step explanation:

In order to find the circumference we need to first find the radius since C = 2πr.

We can find the radius by dividing the area by pi (23.077)

then square rooting it 4.8

now that we know the radius we can just use the circumference equation.

2 x 3.14 x 4.8

your final answer would be 30.162977

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752