I NEED HELP The half-life of radium-222 is approximately 38 seconds.

Determine a so that A(t)=A0a^t describes the amount of radium-222 left after t seconds, where A0 is the amount at time t=0.

ROUND TO SIX DECIMAL PLACES.

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?

What is y times x by? y is __ times x