Alison has $1.60 worth of nickels and dimes in her coin purse. she has 11 more nickels than dimes.
how many of each coin does she have?
enter your answers in the boxes.
and

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply