An investor has an account with stock from two different companies. Last year, his stock in Company A was worth $2600 and his stock in Company B was worth $1120. The stock in Company A has increased 22% since last year and the stock in Company B has increased 10%. What was the total percentage increase in the investor's stock account? Round your answer to the nearest tenth (if necessary).

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'