Recall that the range for cosine is from -1 to 1, including both endpoints. The smallest cosine value is what we're after, since we want the height to be as small as possible (to allow the blade be closest to the table).

Effectively, this means we replace the cos(x) with -1 so that it's as small as possible. Then we compute to get:

20*cos(x)+25

20*(-1) + 25

-20 + 25

The height of the fan tip is 5 cm when it is the closest to the table.

Side note: On the flip side, the furthest away the fan tip can get is 20*(1) + 25 = 45 cm. Therefore, the range of y values is $5 \le y \le 45$

8 0

2 years ago

Can people help? When a grizzly bear hibernates, its heart rate drops to

avanturin [10]

Like you said: 10 beats per minute, which is 20% percent of its normal value.

So: 10 per minute is 20% of the normal rate. You will divide each side by 0.2, which will result in 50 per min

8 0

3 years ago

(4x²+9x-7)+6(x²-10x+3)

polet [3.4K]

Answer:

1Step-by-step explanation:

8 0

2 years ago