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shusha [124]
2 years ago
14

Calculate the surface area of a sphere of radius 5.6 cm. Give your answer to 3 s.f.

Mathematics
2 answers:
Mariana [72]2 years ago
7 0

Answer:

394

Step-by-step explanation:

svlad2 [7]2 years ago
4 0

Answer:

394

Step-by-step explanation:

Surface area of a sphere=4πr^2

4*pi*5.6^2=394.08

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Estimate the rate of change of the graphed function over the interval -4 <_ x <_ 0
dezoksy [38]

Answer:

  0.2071

Step-by-step explanation:

It looks like the graph is of the function ...

  y = √(x +8) -2

We know that (-4, 0) is one point on the graph. The other point of interest is at x=0, where y = √8 -2 ≈ 0.8284.

The average rate of change on the interval is then ...

  m = (0.8284 -0)/(0 -(-4)) = 0.2071

The average rate of change on the interval is about 0.2071.

_____

<em>Rougher estimate</em>

The graph goes through the points (-4, 0) and (1, 1), so has a slope of 1/5 = 0.2 on the interval [-4, 1]. We know the graph does not go through (0, 1), so the slope is not as high as 1/4 = 0.25. The curve is concave downward, so the average slope will be higher than 0.2, but we aren't sure how much higher.

A reasonable estimate of the rate of change on the interval is "a little more than 0.2, but less than 0.25."

4 0
2 years ago
Eugene spent $14 on a magazine and some candy bars. if theagazine cost $6 and each candy bar cost $2 then hpw many candy bar did
Inessa05 [86]
14=6+2x
subtract 6 from both sides
8=2x
divide both sides by 2
x=4 candy bars

5 0
3 years ago
3/5 of the students in a classroom are girls if there are 10 boys in the class how many total students are there
nata0808 [166]
16 students is the correct answer...
for every 5 boys there are 3 girls, so 20 boys 6 girls = the total of 16 students
8 0
3 years ago
A 6-ounce tube of toothpaste costs $2.00. What is the approximate difference in the unit price from the original price if a $1.2
LenKa [72]
I believe it is D, because if you divide 2/6 its .333 minus 1.25/6, which is .124.
4 0
2 years ago
Read 2 more answers
Which of the following is a factor of<br> x2 - 6x + 8
hram777 [196]

Answer:

(x - 4)(x - 2)

x = 4

x = 2

Step-by-step explanation:

x² - 6x + 8

= (x - 4)(x - 2)

x - 4

x = 4

x - 2

x = 2

7 0
3 years ago
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