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atroni [7]
3 years ago
13

Work out the volume of this sphere.

Mathematics
1 answer:
Ratling [72]3 years ago
3 0

Step-by-step explanation:

Find the radius: 19 ÷ 2 = 9.5

4/3 x 22/7 x 9.5 x 9.5 x 9.5 = 3592

3592/3 =

1197.3 (Rounded to 1 decimal place)

Answer: 1197.3cm3

(I have never done area or perimeter of sphere before, but I did for other shapes. This is just my attempt using the methods I did for other shapes by the way)

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6 0
3 years ago
You bike 1 mile the first day of your​ training, 1.3 miles the second​ day, 1.9 miles the third​ day, and 3.1 miles the fourth d
JulsSmile [24]

Answer:

19.9 miles

Step-by-step explanation:

In this problem we have:

d_1=1 mi is the distance travelled during the 1st day

d_2=1.3 mi is the distance travelled during the 2nd day

d_3=1.9 mi is the distance travelled during the 3rd day

d_4=3.1 mi is the distance travelled during the 4th day

We notice that the difference between the distance travelled on the (n+1)-th day and the distance travelled on the n-th day doubles every day. In fact:

d_2-d_1=0.3\\d_3-d_2=2\cdot 0.3 = 0.6\\d_4-d_3=2\cdot 0.6 = 1.2

Which can be rewritten using the general formula:

d_{n+1}-d_n=2(d_n-d_{n-1})

This means that

d_{n+1}=d_n+2(d_n-d_{n-1})

By applying this formula recursively, we can find the 7th term, which is the distance travelled on the 7th day:

d_1=1\\d_2=1.3\\d_3=1.9\\d_4=3.1\\d_5=3.1+2\cdot 1.2=5.5\\d_6=5.5+2\cdot 2.4=10.3\\d_7=10.3+2\cdot 4.8=19.9 mi

So, the  distance travelled on the 7th day is 19.9 miles.

7 0
4 years ago
PLEASE HELP!!!!!!!
lozanna [386]
The correct answer is: <span>C) The base of the cone and the top of the cylinder have the same area. </span>The cone has the smallest volume of the 2 figures. This is because the formula for the cylinder is b x h, the formula for the cone is 1/3(b x h) so if they have same height and base area cylinder would have larger volume because, for the cylinder, a formula is one-third of b x h. Hope I helped!!  : )

hope this helps you


4 0
3 years ago
What is the perimeter of the quadrilateral 9m 5m 7m 11m
Luda [366]

The perimeter is 32m add all sides to find perimeter


4 0
3 years ago
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What is the missing constant term in the perfect square that starts x^2+10x?
max2010maxim [7]
<span>x^2+10x + 25 = (x + 5)^2

missing = 25

hope it helps</span>
4 0
3 years ago
Read 2 more answers
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