# Posts by Moyer

Total # Posts: 14

**chemistry**

When boiled with concentrated aqueous alkali, fats and oils dissolve, but waxes do not. Explain the difference.

**math**

Some books give the following rule of thumb for finding the standard deviation of a normally distributed variable: s= range/6. Explain why this rule works.

**math**

What is the probability of 5 or fewer successes in a binomial experiment with 7 trials if in each trial, the porbability of success is .8?

**math**

A fair coin is tossed 10 times. What is the probability of getting exactly 6 heads?

**math**

Write an expression for the coefficient of x^997 in (x+1)^1008. Find its value.

**math**

Find the coefficient of x^3Y^2z^2 in (x+y+z)^7

**chemistry**

How many moles of water are produced by the complete combustion of 14.4g of C5H12?

**chemistry**

How many moles of sulfate ions are in 100 ml of a solution of .002 M Fe2(SO4)3?

**math**

The first term of a an infinite sequence is an equilateral triangle inscribed in a circle. The triangle has side n. Each new polygon in the sequence is formed by replacing the middle third of each side by two segments that have the same length as each third. As n, increases ...

**math**

The interest rate is 3.69%

**math**

Suppose a car cost 32000 and you are allowed to make a down payment of 20%, but have to borrow the remaining 80%. If you are allowed 5 years to pay back the loan, how much will you pay back monthly?

**math**

Suppose a car cost 32000 and you are allowed to make a down payment of 20%, but have to borrow the remaining 80%. If you are allowed 5 years to pay back the loan, how much will you pay back monthly?

**math**

Identify two different divergent sequences a and b who difference a - b converges.

**math**

Consider the general quadratic eqaution in standard form, ax^2 + bx + c = 0. Let a = 1 and the roots be r1 and r2. Expand (x - r1) (x - r2). Write both algebraic expressions for and descriptions in words of b and c in terms of r1 and r2.