A rumor about canceling spring break is being spread around a school. The following equation models the number of students in the school
who have heard the rumor after t days:
N (t)==1800/1+149e^-0.625t
A.). How many people started the rumor?
B.). How many students are in the school?
C.). To the nearest 1/10, how many days will it be before the rumor
spreads to 1/2 the student body?
D.). The following equation represents the instantaneous rate of change
in students per day of the spread of the rumor.
N1 (t) = 0.625N (1 –N/1800)

child does not get an education so she can use the molla on junk

john got lost so he didn't know what to do and it was crazy because he didn't except it

step-by-step explanation:

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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