The phases of the moon are periodic and repetitive. a new moon occurs when no moon is visible to an observer on earth. during the first quarter, half of the side of the moon facing the earth is visible. during a full moon the entire side of the moon is visible. during the last quarter the other half of the side of the moon facing earth is visible.

the u. s. naval observatory lists the following dates for phases of the moon in the year 2008.

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Agrasshopper weighs 0.89 grams. express the grasshopper’s weight in scientific notation.

Use the information given below, to compare the cost of operating two different vehicles for one month (4 weeks) you are considering two different cars. you drive to work, a 20 mile round trip, five days a week. gasoline costs you $1.50 per gallon car agets 28 miles per gallon, would have $300 a year in maintenance costs, and would cost you $1,500 per year to insure car b gets 19 miles per gallon, would have $500 a year in maintenance costs, and would cost you $1,000 per year to insure costs car a car b gas cost per month insurance cost per month maintenance cost per month $ total cost per month