Sal is saving for a new bike that will cost him $150. he currently has $35 and can save $23 per week. how many weeks will it take him to earn enough money for the bike?
let w equal the number of weeks that sal saves his money. select an equation and solution that matches this situation.
23w+35=150; sal will have enough money in 5 weeks.
23w+35=150; sal will have enough money in about 8 weeks.
150−23w=w; sal will have enough money in 24 weeks.
35w+23=150; sal will have enough money in about 5 weeks.
35w+23=150; sal will have enough money in about 138 weeks.
it now cost $320
have a good day
estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles
first we find out the width of the rectangle
δx=b−a/n, a= 0 and b= 3, n= 3
so δx= 1
divide the interval [0,3] into 3 sub intervals of width=1
[0,1] [1,2] [2,3]
now we plug in end point and evaluate the function
we take left endpoints
f(0) = 16 - 0^2=16
f(1) = 16 - 1^2= 15
f(2) = 16 - 2^2= 12
now sum = δx(f(0) + f(1)+f(2))
= 1 (16+15+12)= 43