Use the exponential decay model, A=A o e^kt. The half-life of thorium-229 is 7340 years. How long will it take for a sample of this substance to decay to 20% of its original amount? Round answers...

Use the exponential decay model, A=A o e^kt. The half-life of thorium-229 is 7340 years. How long will it take for a sample of this substance to decay to 20% of its original amount? Round answers...

I keep getting different answers?

rewrite as an exponential equation: ln30=3.4012

A baseball card sold for $$289 in 1980 and was sold again in 1986 for $483. Assume that the growth in the value V of the collector’s item was exponential.

Leave as a simplified fraction a) 3=log sub 9(x/729) b)log sub 4y=1/3log sub 4(1728) - log sub 4(8)+log sub 4(14) c) write in log form: e^.23=1.259

it says to use the formula for periodic growth to solve each problem. All interests rates are stated as annual rates of interest.

1. Sketch a graph of the function below 2. Identify the horizontal asymptote of this function. 3. What is the maximum population of this habitat? 4. When will the population reach 8,200...

24/x = 3 What is confusing me is the fraction in the exponent.

1.Evaluate log264+log327×log41/254 2.solve for x 2log4(x+4)-log4(x+12)=1 3.solve the equation (cube root256^2)×16^x=64^x-3 4.3x=9^(x^2-1/2) solve for x

Write in exponential form: log16 1/64=-3/2

Round to the nearest cent

Solve for x

x y 0 0.1 1 0.2 2 0.4 3 0.8

Solve for x. (Note: Further simplification may occur in step (b).) Write the answer in terms of natural logarithms, unless no logarithms are involved. Rewrite the answers to each individual logarithm...

x y 0 3 1 1.5 2 0.75 3 0.375

I am wondering how to get x

Method 1: Using the mean current height of trees (found from a given table) to find its age with g(t)=20/(1+19e^(-0.25t) ) +c Method 2: Using the mean growth of the trees (found from a...

Three out of four low-wage workers in the private sector do not have employer-provided health insurance, while eight out of nine do not participate in a pension plan. Three-fourths of low-wage workers...

solve the equation e2x -4ex-5=0