Radium decays according to the function where q represents the quantity remaining after t years and k is the decay constant 0.00043. how long will take for 40g of radium to decay to 10g?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

If the car had not hit the fence, how much farther would it have skidded? solve the skid-distance formula to find the extra distance that the car would have traveled if it had not hit the fence. round your answer to two decimal places. note that unit conversion is built into the skid distance formula, so no unit conversions are needed.

16x^2-16x=5 solve the equation by completing the square