3.8 x 102 + 1.7 x 109, giving your answer in standard form

The circumference of a circle is 5 pi cm. what is the area of the circle?

The system of equations graphed below has how many solutions?

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups