Which of the following theoretical factors increases the rate of a reaction?

(a) increase collision frequency

(b) increase collision energy

(c) effective collision orientation

A sum of $1000 was invested for 4 years, and the interest was compounded semiannually. If this sum amounted to$1435.77 in the given time, what was the interest rate?

Determine the cost of the points and the new interest rate for each loan amount and interest rate. Assume each point costs 1% of the loan amount. $550,000, original APR 4.75%, 1 point with a 0.3% discount.

Find the price a purchaser should be willing to pay for the given bond. Assume that the coupon interest is paid twice a year.

$10,000 bond with coupon rate 5.4% that matures in 12 years; current interest rate is 6.5%.

A $4000 certificate of deposit is purchased for$4000 and is held for eleven years. If the certificate earns an effective rate of 7%, what is it worth at the end of that period?

Assume federal debt reaches about $\$ 20$ trillion in $2017$.

If interest rates remain at the $2012$ level of $2.1 \%$, find the interest payment on the debt. Discuss the change in the interest payment with a $0.5$-point increase in the interest rate.

Suppose that $10,000 is invested at continuous rate r and grows to$17,160 in 9 years. Find the interest rate r.

The Fort House Tea Room borrowed $17,500 for renovations at a simple interest rate of 6.85% for 4 years. The interest is to be paid annually. Find the amount of each annual interest payment.

A $6000 certificate of deposit is purchased for$6000 and is held for seven years. If the certificate earns an effective rate of 8%, what is it worth at the end of the period?

To make CDs look more attractive than they really are, some banks advertise that their rates are higher than their competitors’ rates; however, the fine print says that the rate is a simple interest rate. If a person deposits $10,000 at 10% per year simple interest, what compound interest rate would yield the same amount of money in 3 years?

For the following exercise,

Determine the value of the annuity for the indicated monthly deposit amount, the number of deposits, and the interest rate.

Deposit amount: $\$ 100$; total deposits: $120$ ; interest rate: $10 \%$, compounded semi-annually

All rates of interest given here are annual rates. Calculate the rate of interest per year which will earn the given amount of interest: a) Principal $400 time 4 years interest$112, b) Principal $800 time 7 years interest$224

a. At what interest rate, compounded annually, would you need to invest $500 in order to have$625 in 2 years? b. At this interest rate, how long would it take for your $500 to double in value?

A couple decides to accept an adjustable rate, 30-year mortgage, in which the interest rate is fixed for the first 5 years and then may be adjusted annually beginning with year 6. Suppose that this couple borrows $305,000 with the annual interest rate, compounded monthly, for the first 5 years set at 5.5%. Suppose that the interest rate is increased to 6.75% for the remaining term of the loan. Calculate the monthly payment during the first 5 years and after the first 5 years. Find the amount of interest that would be paid over the term of this loan