Answer:
45 in
Step-by-step explanation:
Base area of a square pyramid is given by
B=a*a=a²
Where a is the length of each side of the base
Volume of a square pyramind is given by
V=⅓Bh
Where h is the height
Given that height is 1.5a then B is a²
V=⅓*a²*1.5a=0.5a³
Given that the volume is 4500 in³
0.5a³=4500
a³=9000
a=3√9000=30
Since height is 1.5a then h=1.5*30=45 in
Answer:
(11b^2 + 7) (11b^2 - 7)
Explanation:
Since both terms are perfect squares, factor using the difference of squares formula, a^2 - b^2 = (a + b) (a - b) where a = 121b^4 and b = 49
The ratio adults to students is 1:6
Multiply both sides by 60 so that the right side is 360 and it is
60:360
Therefore there needs to be 60 adults which is option D
Hope this helps :)
Answer:
Step-by-step explanation:
Step one:
given data
Cost of skateboard= $120
if she has $25 at hand then she will need 120-25= $95 to balance up for the board.
Step two:
We are told that she will sell each book for $5
then for her to realize $95 she has to sell
95/5=19
therefore she has to sell a minimum of 19 books
the equation is
let the number of books be b
b>=19