The number of traffic violations in a city increased from 12 to 16 in a month.

what is the percent of increase in the number of traffic violations for that month?

round to the nearest percent, if necessary.

a 20%

b 25%

c 33%

d 75%

Nine more than four times a number is the same as one less than twice the number. find the number?

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.