a parcel is 90 cm x 50 cm x 60 cm. what length of string is required to tie it up, if the string goes round each way twice (in all six rounds) and 50 cm are needed for the knots?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?