A hot air balloon descended 3,240 feet in an hour. find the change in altitude per minute. PLZ HELP

-54ft/min (-54 feet per minute)

Step-by-step explanation:

To solve this, we need to use background knowledge to get one of our missing numbers.

Since we know an hour is 60 minutes, we need to do 3,240/60 to receive our unit rate. So, 3,240/60 would equal 54.

But, the balloon is descending (going down), so we need to make our answer negative (54 -> -54)

Therefore, the hot air balloon is descending 54 feet per minute, or -54ft/min.

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2