physics
an aeroplane takes off at an angle of 30 degree to the horizontal. if the component of its velocity is 250 km/h, what is the actual velocity?
stats
A researcher hypothesizes that a new herbal supplement improves memory. A sample of n = 25 college students is obtained and each student takes the supplement daily for six weeks. At the end of the 6-week period, each student is given a standardized memory test, and the average...
stats
For a normal population with µ = 100 and σ = 20: 1. What is the probability of a particular score being greater than 110? 2. What is the probability of a particular score being less than 50?
stats
Given a normal distribution with µ = 80, σ= 5, and given a sample size of n = 25, describe the following characteristics of the sampling distribution: 1. Central tendency 2. Variability
stats
A normal distribution has a mean of µ = 28 with σ = 5. What is the minimum raw score needed to be in the top 25% of the distribution?
CHEM AP
Complete and balance the following equation. MnO4^‾ (aq) + CH3OH(aq) ¨ Mn^2+(aq) + HCO2H(aq) (acidic solution) I KNOW ITS a redox, so i followed the steps and got: 4MnO4^- (aq) + 5CH3OH (aq) + 11H2O (l) + 12H^+ (aq) ¨ 4Mn^2+ (aq) + 5HCO2H (aq) can so...
mechanics
center og gravity of a circle
maths
We can cut a square diagonally in half to get two triangles. Suppose the perimeter of the square is 3cm longer than the perimeter of a resulting triangle. What is the perimeter of the square?
Math
We can cut a square diagonally in half to get two triangles. Suppose the perimeter of the square is 3cm longer than the perimeter of a resulting triangle. What is the perimeter of the square?
Chemistry
Iron metal is formed during the reduction of iron(III) oxide: Fe2O3 + 3CO 2Fe + 3CO2 When 24.3 kg of Fe2O3 react with 14.6 kg of CO and 7.8 kg of Fe are recovered, what is the percent yield for the reaction? Pls.. help I am having a hard time finding the answer. The wordings a...
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