To find r, you need to isolate it. pi*r^2*60=18,840. divide 18,840 by 60, then pi, it comes out at 100. Now find the square root to get 10
r=10
Answer:
Surface area of the smaller pyramid will be 225 cm²
Step-by-step explanation:
Two similar pyramids have their matching or corresponding sides in the ratio of 5 : 7.
In other words,
=
Therefore, =
= 225 cm²
Therefore, surface area of the smaller pyramid will be 225 cm².
Answer:
810
Step-by-step explanation:
number of triangles needed = area of rectangle / area of triangle
area of triangle = 1/2 x base x height
1/2 x 6 x 8/3 = 8
area of rectangle = length x width = 90 x 72
90 x 72/ 8 = 810
Answer:
No the relation is not a function
Step-by-step explanation:
This is because there are 2 x factors that have the value of 15. (15,8) and (15,2)
in order to make this a function you would have to change the one of the x factor of the 2 ratios:
(15,8) and (15,2)
Solution:
Here we are given with the number 7,889.
we have been asked to find which places contain digits where one digit is ten times the value as the other digit.
Here the number 7889 can be re-written as
Here we can say
So number 100th place is ten times the number in the 10th place.