A radioactive kind of nitrogen has a half-life of 10 minutes. If you start with 64 grams of the substance, how much will be left after 20 minutes

An airplane flies at a rate of 356 km/h. The plane travels a total distance of 1424 km. (Use Distance = Rate * Time for your equation.)

Find the perimeter of this parallelogram

Janeverything spent $42 for shoes this was $14 less than twice what she spent for a blouse how much was the blouse

The equation for a circle with center (h, k) is (x - h) ^2 + (y - k) ^2 = r^2. If a circle is modeled by the equation x^2 + (y + 6) ^2 = 100, what is the center of the circle?

Find the surface area of a prisma 6 cm 2 cm 3cm

To celebrate, Clare went out to eat with her 3 friends. Their meal, including tax, was $75. If they left a tip, what is their total bill including the tip.

2x + 2/3 equals 1/3 what is X

Jermain made 6 candles. lukas made 4 times as many candles as jermain did. they plan to pack the candles in boxes with 3 candles in each box. how many boxes will they need for all the candles?

Write an expression to represent. the difference of 8 squeared and a number

Which equation has the solutions x=1 + / - √5? x2 + 2x + 4 = 0, x2 - 2x + 4 = 0, x2 + 2x - 4 = 0, x2 - 2x - 4 = 0