Please help. The drop down menus are either exponential growth or decay. Promise brainliest

Problem 1

Explanation:

The base of the exponent 1.25 is in the form 1+r with r = 0.25

r = 0.25 converts to 25%

The fact that r is positive indicates we have growth.

Problem 2

Explanation:

Rewrite 5^(-t) as (1/5)^t. The negative exponent has us apply the reciprocal of the base. The rule is x^(-k) = (1/x)^k = 1/(x^k)

Then we write 1/5 as 0.2 and set it equal to 1+r. Solve for r

1+r = 0.2

r = 0.2-1

r = -0.8

The negative r value tells us we have decay.

Problem 3

This value is approximate

Explanation:

(1.20)^(t/11) = (1.20^(1/11))^t

(1.20)^(t/11) = (1.0167128)^t use calculator, this is approximate

Set 1.0167128 equal to 1+r and solve for r

1+r = 1.0167128

r = 1.0167128-1

r = 0.0167128

r = 1.67128%

r = 1.7%

The positive r value tells us we have growth.

Problem 4

Explanation:

Set the base 0.63 equal to 1+r and solve for r

1+r = 0.63

r = 0.63-1

r = -0.37

r = -37%

The negative r value indicates decay.

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x