Ricardo has 1/2 foot of yarn, how many inches does he have?

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

What would the rule be for the reflection of y=-3

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4