Dublin builder this sandbox he wants to completely fill the sandbox with the hardware store sells 10,000 and 2 bags of sand for $12 each what is the least amount of money to spend in order to completely fill in sandbox

 For example, if the sandbox has a radius of 4 feet, and you want the sand to be 1 foot deep, you will need a little more than 50 cubic feet of sand: 4 times 4 times 3.14 times 1 equals 50.24. This example would require just over 100 bags of sand since each bag fills up half a cubic foot

Step-by-step explanation:

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step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!