Can someone pls help me with question 21 ASAP due today show steps

$ 11,169.85

Step-by-step explanation

First, convert R percent to r a decimal

r = R/100

r = 7%/100

r = 0.07 per year,

Then, solve our equation for A

A = P(1 + r/n)nt

A = 2,000.00(1 + 0.035/2)(2)(25)

A = $ 11,169.85

Summary:

The total amount accrued, principal plus interest,

from compound interest on an original principal of

$ 2,000.00 at a rate of 7% per year

compounded 2 times per year

over 25 years is $ 11,169.85.

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560