30 points ivan is saving money to buy a computer with. he started wih $225 in his savings account and the first week he added $75, the second week he added $200, the third week he unfortunately had to take out $50 and the fourth week he added $125. how much more money does he need to save if the computer cost $895? show your work. a) $220 b) $320 c) $420 d) $575

started with 225 added 75

225 +75 = 300 then added 200

300 +200 = 500, took 50 out

500-50 = 450 then added 125

450 +125 = 575

895-575 = 320

 Answer is B $320

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.