A bag contains 42 cups of dog food. Your dog eats $2 \frac{1}{3}$ cups of dog food each day. How many days does the bag of dog food last?

At the beginning of the semester, procrastinators reported an average of 0.8 symptoms, increasing at a rate of 0.45 symptoms per week. Write a function that models the average number of symptoms after $x$ weeks.

The table shows the portions of a family budget that are spent on several expenses. a. How many times more is the expense for housing than for automobiles? b. How many times more is the expense for food than for recreation? c. The expense for automobile fuel is $\frac{1}{60}$ of the total expenses. What fraction of the automobile expense is spent on fuel?

$$\begin{matrix} \text{Expense} & \text{Portion of Budget}\\ \text{Housing} & {\frac{1}{4}}\\ \text{Food} & {\frac{1}{12}}\\ \text{Automobiles} & {\frac{1}{15}}\\ \text{Recreation} & {\frac{1}{40}}\\ \end{matrix}$$

How many times longer is the baby alligator than the baby gecko?

Divide. Use estimation to check your answer. $3.6 \div 24$

Which of the following statements about culture is true? a. It is possible to identify with more than one culture. b. It is not difficult to move from one culture to another. c. Cultural factors do not affect most aspects of people's daily lives. d. No country can contain more than one culture.

Divide. Use estimation to check your answer. $0.294 \div 3$

You ask 150 people about their pets. The results show that $\frac{9}{25}$ of the people own a dog. Of the people who own a dog, $\frac{1}{6}$ of them also own a cat. a. What fraction of the people own a dog and a cat? b. How many people own a dog but not a cat? Explain.

Describe and correct the error in finding the quotient. $3 \frac{1}{2} \div 1 \frac{2}{3}=3 \frac{1}{2} \times 1 \frac{3}{2}=\frac{7}{2} \times \frac{5}{2}=\frac{35}{4}=8 \frac{3}{4}$

A vitamin C tablet contains $\frac{1}{40}$ of a gram of vitamin C. You take $1 \frac{1}{2}$ tablets every day. How many grams of vitamin C do you take every day?

How does the energy of a hydrogen 1s orbital compare with that of a lithium 1s orbital? Why? What is meant by the term energy of the orbital? What is its sign? Why? What is meant by the term lower in energy?

Which is larger, the H 1s orbital or the Li 1s orbital? Why? Which has the larger radius, the H atom or the Li atom? Why?

Which is larger, the $\mathrm{H}~1s$ orbital or the $\mathrm{Li}~1s$ orbital? Why? Which has the larger radius, the $\mathrm{H}$ atom or the $\mathrm{Li}$ atom? Why?

Consider an atom X that has valence electrons in lower energy orbitals compared to atom Y. Which atom, X or Y, has the larger ionization energy? Explain.