mean = 82 1 std dev = 5 2 std dev = 10 for a normal distribution +/- 1 std dev = 68.2 % or 34.1% to each side of the mean +/- 2 std dev = 95.4 % or 47.7% to each side of the mean I hope this graphically shows the...

mean = 82 1 std dev = 5 2 std dev = 10 for a normal distribution +/- 1 std dev = 68.2 % or 34.1% to each side of the mean +/- 2 std dev = 95.4 % or 47.7% to each side of the mean I hope this graphically shows the...

I will assume you know how to do synthetic division for testing factors If not long division should also work For synthetic division we write the coeff of the polynomial, then use the X value of the zero (or root) For (X - 1) we then use X=1 For the 1st eqn...

POTENTIAL ENERGY = MGH KINETIC ENERGY = MV2/2 G = 9.8 M/S2 (Gravity accel at earth surface) THE SUM OF POT ENERGY AND KINETIC ENERGY SHOULD BE EQUAL AT POINTS (FROM H=0 - 15M) IN THE FALL. ...

Find the time (answer)

THE PHYSICS EQN IS JUST X = ACC*T2/2 + V*T + X0 FOR BOTH CARS, THEY HAVE NO INITIAL SPEED V1 OR DISPLACEMENT X0 SO X = ACC*T2/2 CAR A HAS ACC = 5.5 BUT LEAVES 1.5 SEC AFTER CAR B CAR B HAS ACC = 4.4 XB...

the number of each coin times their value is the total amount, so P = number of pennies N = number of nickels D = number of dimes so we can write our total cents equation: P(1) + N(5) + D(10) = 64 ! numbers...

David is 17 pounds lighter than Pablo . The total weight is 259 pounds . Find David's weight. (answer)

Let D = Davids weight and P = Pauls weight if David is 17 lbs less than Paul, we can wright that as D = P - 17 Together they weigh 259, so D + P = 259 Now just replace D in the 2nd eqn with D from the 1st eqn (P-17)...

The speed (or rate) of the bike is distance divided by time OR 7.5 mi / hr . Rate x Time = Distance so, 7.5 mi/hr x 1/3 hr = 7.5/3 = 2.5 mi in 1/3 hr she'd ride 2.5 miles

Just use the ratio of 150 M to 0.03 (Note: 150 M = 15,000,000) think of it as 150 Million years is to 3% History as X years is to 100% History express 3% as 0.03 and 100% as 1.0 M = Million H = HISTORY...

the question doesn't say how many dolls. there would be an infinite number. But we'll just form the equation for the nth doll. Largest doll = 12 inches 2nd doll = (12) x 0.7 3rd doll = (12...

Let M = cost of 1 muffin Let Q = cost of 1 quart of milk then the cost equations are: #1 8M + 2Q = $18 #2 3M + 1Q = $7.50 We can solve two ways. 1) use one eqn to solve for one variable in terms of the other, then...

The rate of work x time = Task (or amount of Work) Let Shirley's rate = Sdot Let Cora's rate = Cdot (xx"-dot" is typically used for a rate) So, if we take rate x time = T (T = task) 1)...

If I understand your typing, I'm assuming the following: P = (0.5)A2 COS(2A) For rate, we take the derivative, then plug in value A = 1.8 For the derivative DP/DA = D/DA [0.5 A2] *COS(2A) + 0.5A2 D/DA [COS(2A)] DP/DA...

4/(x+5) < 1/(2x+3); solve for x (answer)

4/(X+5) < 1/(2X+3) FIRST MULTIPLY BOTH SIDES BY (X+5), AND THEN (2X+3) THIS IS THE EQUIVALENT OF CROSS MULTIPLYING 4(2X+3) < X+5 OR 8X + 12 < X + 5 NOW...

True or False? (answer)

2Y = 5X + 4 IN SLOPE INTERCEPT FORM, SOLVE THE EQUATION FOR Y WHERE Y = MX + B SLOPE = M, AND B = Y INTERCEPT Y = (5/2)X + 4/2 OR Y = (5/2)X + 2 THEREFORE, THE SLOPE = 5/2 ...

There are simpler ways to solve, but it asks to form linear eqns of 2 variables. we know that 1 can of concentrate = (pure juice+ some water) we add 3 cans of water = 4 cans of mix that has (J) amt of pure juice so the concentrate is made...

2/3 lbs divided among 12 people so, (2/3) / 12 this can be written as 2/3 * 1/12 = 2/36 factor num and denom by 2 each person would get 1/18 lb

algebra word equation (answer)

Set up as an inequality so the pay is at least as much as $90,000 43,800 + 2950*T >= 90,000 Now just solve for T. first subt 43,800 from each side 2,950*T >= 90,000 - 43,800 ...

could someone help me with math? (answer)

7B - 12 < 3B With any equation, isolate the variable (in this case B) on one side, and the constant on the other remember, always add, subtract, divide, multiple the same to both sides !! 1) subtract 3B from each side 7B - 3B - 12 < 0...

If you are using the exponential function, Exponential decay is often expressed as: e^-kT where k is found by taking the natural logarithm T = time so using this, the decay rate would be: e^-kT = (1-0.22) =...

for line 2 to be perpendicular to line 1, line 2 slope is the negative reciprocal of line 1. so, we need to find the slope of line 1. for the equation, 5X - 4Y = 2 the slope(m) = -A/B. Here A=5, B= -4. So the slope(m) = -5/-4 or 5/4 A line is perpendicular...

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