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Rainbow [258]
3 years ago
15

What is the area of a 20-gon with radius 5 in

Mathematics
1 answer:
Degger [83]3 years ago
8 0
Assuming that is the circumradius:
Polygon Area = [r^2 * n * sin (360 / n)] / 2
Polygon Area = (25 * 20 * sin (18)) / 2
Polygon Area = (500 * 0.30902) / 2
Polygon Area = <span> <span> <span> 77.255 </span> </span> </span>





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of the 9 students surveyed, 4 said they prefer exercising in the morning.express the fraction as a decimal. use bar notation if
almond37 [142]
4 of 9

so 4/9 = 0.44444444444444444444444444444repeating

(sorry, not sure how to get bar notation for that)
3 0
3 years ago
Find 15/4 + (-4 1/3). Write your answer as a fraction in simplest form.
Montano1993 [528]

Answer:

-17/12

Step-by-step explanation:

15/4 = 3 3/4

3 3/4 -4 1/3 =  3 9/12  -4 4/12  =  -17/12

3 0
3 years ago
A chef uses 3 3/4 pounds of semolina flour and 1 5/8 pound whole wheat flour for each batch of pasta she makes.one week she uses
Maurinko [17]
It is to be noted that for this item, we more concern of the pounds of flour. The number of batches is calculated by dividing the total mass of flour used by the amount per batch. That is,
                                              n = 86 lbs / (1 + 5/8 lbs/batch)
                                              n = 52.92 batch
Thus, the chef makes approximately 53 batches of pasta. 
4 0
3 years ago
A lap around Natalie's neighbourhood is 20 kilometres. Natalie ran 2 laps before
Fynjy0 [20]
I would say about 40 kilometers it’s ifs 20 around her neighborhood that 20+20=40 and walking tha rest made the question easier but yea 40
8 0
3 years ago
1. A ball's position, in meters, as it travels every second is represented by the position function s(t) = 4.9t2+ 450.
bezimeni [28]
1) The ball's position is described by:
s(t) = 4.9t² + 450
We want to find the velocity, which is the 1st-order derivative of the displacement function (I assume this is an introductory calculus class)
s'(t) = v(t) = 9.8t           
We get this by multiplying 4.9 x 2 and reducing the exponent by 1. Now we simply plug 5 in for t.
v(5) = 9.8* 5
v(5) = 49m/s

2) Our cost function is C(x) = x² - 10,000
To find the average rate of change between these units, we use this formula:
( C(101) - C(100) ) ÷1 .
We find the change in C, and divide by the change in x, which is just one. 
C(101) = 101² - 10,000
C(101) = 201

C(100) = 100² - 10,000
C(100= 0

C(101) - C(100) = 201 
Average rate of change in cost is 201 dollars/ unit between the two points. 
7 0
3 years ago
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