The surface area of a sphere is directly proportional to the square of its radius. Find: a)the change in surface area of radius
decreases 19% b) The change in radius of the surface area is trebled
1 answer:
Answer:
a: 34%
b: couldn't find the answer
Step-by-step explanation:
first we put the radius as r
we know surface area is 4pirsquared
so then we minus percent which is 119 so it is 81/100
square that fraction which will result 6561/10000
now we put in and equation of 4pirsquared -4pirsquared multiply 6561/10000 divide this all by 4pirsquared to get 3439/10000 or 0.3439 change it to %
34.39%
You might be interested in
Answer:
area of circle is 113.04 (i used 3.14 for pi) 3.14 x 6^2
area of square is 24 - 12 x 2 = 24
area of square without circle is 89.04 - 113.04 - 24 = 89.04
Step-by-step explanation:
Answer: Option 2
Step-by-step explanation:
Let f(y)=x.
It's <span>0.72 yards.
1 = 0.02
so 26*0.02=0.72</span>
Answer:
x = -5
Step-by-step explanation:
Get x by itself on the left side. To do that, subtract the 7. Do to both sides. This makes x = -5
40 to the second power is 1600!
