A survey was conducted to find out the monthly expenditure on groceries of 30 households. 

The data (in rials) are as follows:

(a)   Organize the data into a frequency distribution table with class intervals of width 50 rials.

(b)   Draw a histogram of the data.

(c)   Compute the mean monthly expenditure on groceries.

Consider the functions    and  .

(a)   Find the function .

(b)  The domain of   is ...  

(a)   Consider the exponential function  .

        Use graph transformations to sketch the graph of .                               

(b)    Solve the exponential equation:   .                               

Find the time required for an investment of 4000 rials to grow to 5000 rials 

at an interest rate of 7.5 % per year, compounded quarterly.

Round your answer to the nearest year.

The average weight (mean)

of a group of 10 people is 57.1 kg. 

If one person, whose weight is 49 kg,

leaves the group, what is the new mean?

An amount of Rials accumulated to Rials after years in an account in which interest was compounding continuously. 

Find the interest rate compounding continuously at which the money was invested.

Solve the logarithmic equation:   

Find an effective rate equivalent to a nominal rate of compounding quarterly.

A trust fund for a child is being set up by a single payment so that after 16 years the child will receive $45000. How much should be paid into the fund if the fund earns an interest rate of 6% compounded semiannually?

If a principal of  Rials is invested at an interest rate of % compounded monthly, find the compound amount after years.