An x-ray technician works 5 days per week, 50 weeks per year. Assume the technician takes an average of eight x-rays per day and receives a dose of 5.0 rem/yr as a result. Estimate the dose in rem per x-ray taken.

Use the integration capabilities of a graphing utility to approximate the work done by a press in a manufacturing process. A model for the variable force F (in pounds) and the distance x (in feet) the press moves is given. Force: F(x) = 1000 sinh x Interval: 0 ≤ x ≤ 2

Many radioisotopes have important industrial, medical, and research applications. One of these is $^{60}Co$, which has a half-life of 5.2 years and decays by the emission of a beta particle (energy 0.31 MeV) and two gamma photons (energies 1.17 MeV and 1.33 MeV). A scientist wishes to prepare a $^{60}Co$ sealed source that will have an activity of at least 10 Ci after 30 months of use. What is the minimum initial mass of $^{60}Co$ required?

Determine the following limits or state that they do not exist.

$$\lim _ { x \rightarrow 2 ^ { - } } \frac { x ^ { 2 } - 4 x + 3 } { ( x - 2 ) ^ { 2 } }$$

Name the three main fossil fuels.

a. What is a fossil? b. In general, how does a fossil form? c. Which parts of an organism are most likely to be preserved as fossils? Why?

Use a conversion factor to perform the indicated conversion. 7.5 kilograms to grams

In a binomial experiment with n trials, what does the random variable measure?

Make a table and a histogram showing the probability distribution for the random variable. N = the number of digits in a random integer from 0 through 999.

Infer Why did the United States support Chiang Kai-Shek and the Nationalist Government during the war between the Red Army and the Nationalists?

List the differences between lymphatic fluid, blood plasma, and interstitial fluid.

In which process is mass converted to energy by the process of fission? (1) $^{14}_{7} \mathrm{N}+^{1}_{0} n\rightarrow ^{14}_{6} \mathrm{C}+ ^{1}_{1} \mathrm{H}$, (2) $^{235}_{92} \mathrm{U}+^{1}_{0} n\rightarrow ^{87}_{35} \mathrm{Br}+ ^{146}_{57} La + 3^{1}_{0}\mathrm{n}$, (3) $^{226}_{88} \mathrm{Ra} \rightarrow ^{222}_{86} \mathrm{Rn}+ ^{4}_{2} \mathrm{He}$, (4) $^{2}_{1} \mathrm{H}+^{2}_{1} H\rightarrow ^{4}_{2} \mathrm{He}$.

How are fossil fuels formed?

The maximum safe load that a cylindrical column of circular cross section can support varies directly as the fourth power of the diameter and inversely as the square of the height. If a column $1.5$ feet in diameter and $8$ feet high safely supports $4$ tons, how much of a load can a column $4$ feet in diameter and $12$ feet high safely support? Round to the nearest tenth of a ton. Assume the two beams are made of the same material.