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NYSTCE CST Multisubject Childhood 1st-6th grade Part 2 math questions and answers
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Interest formula I=PRT P- principal or original amount R- interest rate in decimal form T-time in years Total amount after interest A=P(1+rt) Quadratic Formula x = -b ± √(b² - 4ac)/2a quadratic equation ax² + bx + c = 0 Probability of 2 or More Events Multiply probabilities IQR Mean of Q3-mean of Q1 Variance 1. Find mean 2. Subtract mean from each value 3. Square each difference 4. Add differences 5. Divide by amount of values Standard deviation the square root of the variance 90 degree rotation (x,y) - (-y,x) 180 rotation (x,y) - (-x,-y) 270 rotation (X,y) (y, -x) percent Part/whole=percent/100 Part/whole= decimal/1
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