If the markup was 45% of the selling price, the cost was 55%, so the markup based on cost was 80%. So, if the cost was c, 1.8c = 600 c = 333.33 The sale price was 75% of 600, or 450. So, the markup was 116.66 the sale price of 450 is thus a markup of 50% of cost 26% of selling...
less than 1.8 means the 1st two digits are 1.3 or 1.4 or 1.6 Now just pick the largest and add on the remaining digits, from high to low: 1.6843
in lowest terms, that would be 2/3, since 10/15 = (5)(2)/(5)(3) and the 5's cancel out. If you multiply top and bottom by the same thing, there are lots of other equivalents: 4/6 6/9 8/12 ...
get number n twenties = int(n/20) n=n-20*twenties tens = int(n/10) n=n-10*tens fives = int(n/5) n=n-5*fives ones = n
algebra - incomplete
c = 190x+60
is this not something you can do on a calculator? in your head? or just a cruel joke?
Math - Trig
assuming all these buildings are the same one, if the building is at distance d from the tree of height h, draw a diagram to see that (150-h)/d = tan 50° h/d = tan 22° plugging in the numbers, h+1.19d = 150 h = 0.40d So, we have h = 94.3 d = 37.7
Math - Trigonometry
cosA = 1200/d Now just plug in the values for d to find cosA.