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brilliants [131]
3 years ago
15

I need help with number 12 plz

Mathematics
2 answers:
OlgaM077 [116]3 years ago
6 0

Answer:

347 is the initial spider population

Step-by-step explanation:

y = ab^x

is the formula for exponential growth and decay

a = the initial value

b is the growth or decay rate

b>1  it is the growth rate  (b-1) is the percent

0<b<1 it is the decay rate (1-b) is the percent

y = 347(1.2)^x

347 is the initial spider population

(1.2-1) = .2 = 20 % growth rate

tresset_1 [31]3 years ago
4 0

Answer:347


Step-by-step explanation:

Initial value is the number without variable


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Answer:

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3 years ago
A pennant is shaped like a right triangle with a hypotenuse of 10feet. The length of one side of the pennant is two feet longer
marissa [1.9K]

Answer:

6 ft and 8 ft

Step-by-step explanation:

let x be the length of one leg then (x + 2) is the other leg.

Using Pythagoras' identity in the right triangle, that is

x² + (x + 2)² = 10² ← expand left side and simplify

x² + x² + 4x + 4 = 100 ( subtract 100 from both sides )

2x² + 4x - 96 = 0 ( divide all terms by 2 )

x² + 2x - 48 = 0 ← in standard form

(x + 8)(x - 6) = 0 ← in factored form

Equate each factor to zero and solve for x

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But x > 0 ⇒ x = 6

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6 0
4 years ago
james just bought a new car for 26,950 if it decreases in value by 15% annually how much will it be worth in five
puteri [66]
I believe the answer is 20212.5 if you meant how much will it be worth in 5 years.
I got this answer by multiplying 15% by 5 since annually means yearly.
15%(5)=75%
then turn 75% into a decimal by dividing 75 by 100
75/100=.75
Finally multiply 26950 by .75
26950 (.75)=20212.5

Hope this helps you.
4 0
4 years ago
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