the charge of 1 unit of electricity is increased from 6 cents to 6.25 cents. If a household reduces its consumption by 1.6%, by what percentage will his electricity bill increase? By what percentage does a household need to reduce its consumption in order that the electricity bill remains unchanged?

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

Can some one me with these questions