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Yuki888 [10]
3 years ago
13

Whitney starts the engine on her small private airplane. The engine drives a propeller with a radius of 6.5 feet and its centerl

ine 10.5 feet above the ground. At idle, the propeller rotates at a constant speed of approximately 850 revolutions per minute. The height of one propeller tip as a function of time is given by h = 10.5 + 6.5 sin(850t), where h is the height in feet and t is the time in minutes. Find h when t = 2 minutes
a. 4.1 ft
b. 9.4 ft
c. 16.9 ft
d. 11.6 ft
Mathematics
1 answer:
BartSMP [9]3 years ago
5 0
To calculate time at t= 2 minutes. We substitute at t = 2. 
h = 10.5 + 6.5 sin(850t) 
h = 10.5 + 6.5 sin (850 * 2) 
h = 10.5 - 6.4012 = 4.1 feet 
Hence at time t = 2, height = 4.1 feet.
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I need help finding x
Nastasia [14]
All sides of a triangle add up to 180 degrees. Since we know one angle is 93 degrees, we know that the top part is going to equal 180 degrees. We know that two of those measurements are 93 and 45, so we add those together to get 138. We subtract this from 180 to find the missing angle, which is 42 degrees. So, the left side of the triangle is equivalent to 45 degrees and the right side (x) is 42 degrees. 93 + 45 + 42 = 180. If it was asking for the measurements of the supplementary angles to the bottom angles of the triangle, then those would be (for 45) 135 and (for 42) 138, that way both angles and their supplements add up to 180 each. I hope this helps and that it’s right
8 0
4 years ago
Linda is making a mosaic stepping stone to place in
Lorico [155]

Answer:

D 565.2 in

Step-by-step explanation:

First you need to find the area of the stepping stone. The rule for area of circle is pi times radius squared. To find the radius you divide 12 by 2 = 6. After you do 6 times 6= 36 you multiply 36 times pi (3.14) = 113.04. After we find the are of the stepping stone we multiply it by five to get how many inches we have to cover. 113.04 times 5= 565.2 in.

3 0
3 years ago
30 g serving of a certain breakfast cereal has 0.5 g of salt. How much salt would that be in milligrams?
Alex17521 [72]
500 milligrams is the answer
7 0
3 years ago
Read 2 more answers
Cual es el resultado al realizar la siguiente operacion 4/9*2/5*3 2/4?
Rama09 [41]

Answer:

0.62222222222

Step-by-step explanation:

5 0
4 years ago
Write an inequality for x that would give this rectangle an area of at least 300ft sq2
Diano4ka-milaya [45]

Answer:

Step-by-step explanation:

P≥300

300≤P

P=2(L+W)

300≤2(L+W)

L=3

W=x+5

300≤2(3+x+5)

300≤2(8+x)

divide both sides by 2

150≤8+x

minus 8 both sides

142≤x

x is at least 142

width is at least 147

6 0
3 years ago
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