Can someone help me figure out how many cubes are needed to make each figure?Please help ASAP! :(

1. 20 and 2. 18

Step-by-step explanation:

for the first of you count all of them visible you would get the bottom layer, then the second one From the bottom count all visible except the bottom row (so on and so fourth) and for the second one you just count by three 6 times because the faces closest to you count as three

5

step-by-step explanation:

(a) {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …}

(b) $59 398

step-by-step explanation:

(a) the annual sequence of profits

aₙ = a₁rⁿ⁻¹

the model for the sequence of profits is {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …} .

(b) profit after 15 yr

  a₁ = $ 30 000

  r = 1.05

a₁₅ = 30 000 × 1.05¹⁴

a₁₅ = 30 000 × 1.979 93

a₁₅ = $59 398

the profit in year 15 will be $59 398.