Which equation is equivalent to: 11r+4=55
a.- 11r=55+4
b.- 11r=55-4
c.- -11r=55-4
d.- -11r=55+4

If jaime wants to find 60% of 320, which table should he use?

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?