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Questions in Grade College

[Answered] Suppose that the number of bacteria in a certain population increases according to a continuous exponential growth model, with a growth rate parameter of 16% per hour. Suppose also that a sample culture of 2900 bacteria is obtained from this population. Find the size of the sample after five hours. Round your answer to the nearest integer. Note: This is a continuous exponential growth model. And though the growth rate parameter is 16% per hour, the actual growth is not 16% each hour.

[Answered] Animals that lack the principal body cavity positioned between the body wall and the intestinal tract are classified as A. gastrovascula B. coelomates C. segmented D. acoelomates

[Answered] What does a disinfectant do? A. Reduces bacteria to safe levels. B. Removes grease and dirt. C. Kills all bacteria. D. Kills spores.

[Answered] 3,017 books were sold at a bookstore. One book is about soccer, one is about basketball, and one is about baseball. The store sold 3 times as many soccer books as baseball books. The same number of basketball books were sold as soccer books. How many soccer books were sold?

[Answered] Solve $3 k x+24=9 k x$ for $x$. A. $x=\frac{4}{k}$ B. $x=-\frac{4}{k}$ C. $x=\frac{2}{k}$ D. $x=-\frac{2}{k}$

[Answered] Group A has 30 students with a mean score of 50 and a standard deviation of 8. Group B has 40 students with a mean score of 55 and a standard deviation of 6. Find the combined mean and combined standard deviation.

[Answered] If $x+2$ is the only factor of the polynomial $P(x)$, then $P(-2)$ is: A. Zero B. $P(2)$ C. Not Zero D. Cannot be determined

[Answered] Simplify the following: (i) $\left[3 \frac{1}{9} \times 2 \frac{4}{7}\right] \times 1 \frac{7}{8}$

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Select the correct answer from each drop-down menu. Consider the equation below. [tex]$-2(5 x+8)=14+6 x$[/tex] The equation was solved using the following steps. Step 1: [tex]$-10 x-16=14+6 x$[/tex] Step 2: [tex]$-16 x-16=14$[/tex] Step 3: [tex]$-16 x=30$[/tex] Step 4: [tex]$x=\frac{30}{-16}$[/tex] Step 5: [tex]$x=-\frac{15}{8}$[/tex] Complete the statements below with the process used to achieve steps 1-4. Step 1: [ ] -2 to [tex]$5 x$[/tex] and 8. Step 2: [ ] [tex]$6 x$[/tex]. Step 3: [ ] 16. Step 4: [ ] -16.