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math
260 is 40% of what number? I just need to know if I multiply 260 by 40 % or do I divide 260 by 40 %? 
5th grade math
divide and simplify 7/18 divided by 14/39 the first step is to change the recipricol which is 14/39 = 39/14 then multiply 7 x 39=273 18x14=252 the answer is 273/252 I am not good at simplifying big numbers can someone please help me? 
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What do you call an angle more than 90 degrees and less than 180 degrees? 
7th grade math Ms. Sue please
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Chemistry
A reference solution is to be prepared with 5 PPM parabenzopyrene (molecular weight = 252). The quantity of parabenzopyrene required for preparing one litre 5 PPM solution is (A) 252 mg (B) 25.2 mg (C) 5 mg (D) 252 g 
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Serious violations were issued citing 29 CFR 1910.252(a)(2)(iii)(B) and 1910.252(b)(2)(i)(A). Using the PDCA framework, develop a plan that will correct the deficiencies and ensure that the violations do not recur. 
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A polynomial function P is given. P(x) = x4 − 13x2 + 36; [−6, 6] by [−260, 260] Find all solutions of the equation P(x) = 0. (Enter your answers from smallest to largest.) 
Math
1. Solve the equation. 6g = 42 a. g = 7 b. g = 7 c. g = 252 d. g = 252 2. Solve the equation. x/8 = 16 a. x = 128 b. x = 24 c. x = 8 d. x = 2 3. Solve the equation. 12m = 14.4 a. m = 120 b. m = 12 c. m = 1.2 d. m = 0.12 4. Solve … 
math
10/20 + 11/13 I know I have to first find the LCM which is 260. Then I found the equivalent fractions which were 130/260 and 220/260. When I add those I get 350/260 which is an improper fraction. Then I change that to a mixed number … 
maths
The sum of the first two terms of a gp is 28, but the sum of the 3rd and 4th terms is 252. find the 2nd term of the GP if the 7th term is 5103.