Amusic recording company has contracts with two bands. the cds of these bands are released in three countries, britain, canada, and australia. the total number of cds sold in each country is britain, 40,000; canada, 50,000; and australia, 30,000. the cost of advertising for both bands was $2 per cd in britain, $1.50 in canada, and $1 in australia. if matrix a = [2 1.5 1], what is matrix b if ab represents the total advertising cost (in dollars) for all three countries?

the order of matrix B is [3 x 1] , and the order of matrix AB is [1 x 1]

. The total advertising cost for all three countries is $ [185,000] .

Step-by-step explanation: I got this right on Edmentum.

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.