**Answer:**

18.14 rounds to 18 because you look at the 1 and (0, 1, 2, 3, 4) tell you to round down. That means 18.14 rounds down to 18

9.88 rounds to 10 because you look at the first 8 and (5, 6, 7, 8, 9) tell you to round up. That means 9.88 rounds up to 10.

Now it's just simple math. 18-10 = 8

**Step-by-step explanation:**

Number of songs * cost per song

n * .99

**.99n**

**Answer:**

**534 is it a division problem or a quotient**

**Step-by-step explanation:**

anyways 482+52

add 2+2+4

add 8+5=13

add 4+1+5

put them together

534

**Answer:**

b=−m^3r+m^3t

**Step-by-step explanation:**

= 3 - 3cos x - 2(1- cos^2 x)

= 2cos^2 x - 3cos x + 1

=(cos x -1)(cosx - 1/2)

now cos x = 1 or cos x= 1/2

draw a graph we get = + ve values

hence .. 0 ,180,360 and 60,240, degrees in range x<2pi