A student made the following notes about the current weather conditions. Which statement is most likely an inference? (1) The temperature 3 hours ago was

$$20 ^ { \circ } \mathrm { C }$$

. (2) The current air pressure is 1000.4 millibars. (3) The sky is completely overcast with clouds. (4) Rain will occur in the next 6 hours.

Average Rainfall

Write a program that calculates the average rainfall for three months. The program should ask the user to enter the name of each month, such as June or July, and the amount of rain (in inches) that fell each month. The program should display a message similar to the following:

The average rainfall for June, July, and August is 6.72 inches.

Which statement correctly describes what happens to energy from the Sun once it reaches Earth? (a) Earth’s surface absorbs about half of the total energy and re-radiates it as infrared energy. (b) Earths atmosphere reflects about half of the energy back to space. (c) Earth’s forests absorb about half of the total energy, converting it into chemical energy. (d) Earth's oceans absorb about half of the total energy, causing them to warm up.

A rare species of insect was discovered in the Amazon Rain Forest. To protect the species, environmentalists declared the insect endangered and transplanted the insect into a protected area. The population P of the insect t months after being transplanted is $P(t)=\frac{50(1+0.5 t)}{2+0.01 t}.$ What will the population be after 5 years?

Certain deciduous trees grow in tropical dry forest and lose water through their leaves every day. During summers with adequate rain, the leaves remain on the trees. During the cold, dry season, the trees drop their leaves. Suppose there is an especially dry dry summer. How might the adaptation of dropping leaves enable a tree to tolerate the drought?

Underline the subject complements in the following sentences. Identify each complement by writing above it PN for predicate nominative or PA for predicate adjective.

Example 1. Chico Mendes was a rubber $\overset{\textit{\color{#c34632}{PN}}}{{\underline{\text{tapper}}}}$ from Brazil.

He warned that the destruction of the Amazon rain forest was a threat to the world.

The average monthly precipitation P in inches, including rain, snow, and ice, for San Francisco, California can be modeled by

$$P=2.91 \sin (0.4 t+1.81)+2.38, \quad 0 \leq t \leq 12$$

where t is the time in months, with t=1 corresponding to January. Find the total annual precipitation for San Francisco.

You are driving home from school steadily at $95 \mathrm{~km} / \mathrm{h}$ for $130 \mathrm{~km}$. It then begins to rain and you slow to $65 \mathrm{~km} / \mathrm{h}$. You arrive home after driving 3 hours and 20 minutes. How far is your hometown from school?

In one step of the industrial process for producing copper from chalcopyrite (CuFeS ${ }_2$ ), molten copper(I) sulfide is reduced with a blast of hot air:

$$\mathrm{Cu}_2 \mathrm{~S}(l)+\mathrm{O}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{Cu}(l)+\mathrm{SO}_2(\mathrm{~g})$$

(a) How many kilograms of $\mathrm{Ca}_2 \mathrm{~S}$ must be reduced to account for the world's annual copper production of about $1.4 \times 10^{10} \mathrm{~kg}$ ? (b) How many liters of $\mathrm{SO}_2$ at STP are produced as a byproduct? (c) If all the $\mathrm{SO}_2$ escaped into the atmosphere and were converted to sulfuric acid in acid rain, how many kilograms of $\mathrm{H}_2 \mathrm{SO}_4$ would there be in the rain?

A rare species of insect was discovered in the Amazon Rain Forest. To protect the species, environmentalists declared the insect endangered and transplanted the insect into a protected area. The population P of the insect t months after being transplanted is $P(t)=\frac{50(1+0.5 t)}{2+0.01 t}$ What will the population be after 5 years?

When nitrogen dioxide $\left(\mathrm{NO}_2\right)$ from car exhaust combines with water in the air, it forms nitric acid $\left(\mathrm{HNO}_3\right)$, which causes acid rain, and nitrogen oxide. How many grams of $\mathrm{NO}_2$ are needed to form 75.0 g of $\mathrm{HNO}_3$ ?

Use the table for this exercises. Determine if a true biconditional statement can be written from the conditional.

If a solution is bleach, then its pH is 13.

Use the table for this exercises. Determine if a true biconditional statement can be written from the conditional.

If a solution has a pH of 4 , then it is tomato juice.

Suppose that the crop yield of corn farmers in Iowa depends solely on rainfall levels. Also suppose that every part of the state gets approximately the same amount of rain as every other part in any given year. Will the corn farmers of Iowa be able to effectively use pooling to reduce their exposure to risk? Why or why not?