$\frac{b}{5}\ge-4$  

Meteorites are of three kinds: stones, irons, and stony irons. Each corresponds to a different part of planet formation. The stones resemble pieces of planetary crust and mantle, the irons the planet cores, and the stony irons the transitional area between core and mantle. In some stony irons, translucent crystalline structures interpenetrate with opaque mantle rock. Collectors sometimes cut stony irons into thin slices and illuminate them from one side for a gorgeous stained-glass effect. Only one per cent of all meteorites are stony irons. Five per cent are irons, and the remaining ninety-four per cent are stones.

The main function of the paragraph is to:

The product  $\left(2x^4y\right)\left(3x^5y^8\right)$  is equivalent to:

The underlined word or phrase with a number will correspond with sets of alternative words/phrases. From the options, choose the answer choice that works best in context.

The following day, I caught a train south from Barcelona to Costa del Sol. On the way, I stopped off in Granada, reputedly one of the (1) more prettier cities in Spain.

A geomagnetic storm in Earth's magnetic field is indicated by an A_p greater than or equal to 30 nT. According to the Figure, a geomagnetic storm occurred at some time during each of how many years, if any, of the 13-year period?

Which of the following sets of plants served as the control in the experiment?

Herbicides are used to control the growth of weeds. An herbicide that may be used safely with one crop species may damage another crop if the latter crop is planted in soil containing residual amounts of the herbicide from an earlier application. The following experiment was performed to study this effect:

A botanist filled 90 pots with Soil Type 1. No herbicide was added to the soil in 10 pots. The other pots were divided into groups of 10 and the soil in each group was treated with 10, 20, 50, or 100 ppm of either Herbicide A or B. All other factors were held constant. Ten seeds of a corn hybrid were planted in each pot. After 40 days, the plants were uprooted, oven-dried, and weighed. The results are shown in the following table:

The underlined word or phrase with a number will correspond with sets of alternative words/phrases. From the options, choose the answer choice that works best in context.

An average modern desktop computer is about 2,000 times faster than a PDP-1 and (1) have about 100,000 times as much random-access memory.

Towering above the harbor in Alexandria, Egypt, the Pharos (lighthouse) was one of the Seven Wonders of the Ancient World. Roughly the height of a forty-story building, a signal fire was present there that guided sailors for hundreds of years.

Which choice clearly establishes that it was the Pharos that was roughly forty stories tall?

Lines p and q intersect at point (1,3) in the standard (x,y) coordinate plane. Lines p and r intersect at (2,5)

Which of the following is an equations for line p?

The oldest known eye, that of a fossil trilobite, is a compound eye as big as a dragonfly’s. At least half of all animals, including most insects, have compound eyes. Unlike the human eye, with its single lens and single retina, a compound eye is an intricate arrangement of many little eyes, or ommatidia, each with its own retina and lens. A firefly’s eye has several hundred ommatidia; a honeybee’s eye, several thousand.

The main purpose of the paragraph is to:

Enzymes are large protein molecules that increase the rate of chemical reactions in living systems. The substrate is the substance that interacts with the enzyme in a reaction. The acceleration factor is the factor by which the enzyme increases the rate of a reaction.

Below shows the effects that changes in pH has on the rate of reaction of a substrate when Enzymes A and B are present.

What is the slope of any line parallel to the line 8x + 9y = 3 in the standard (x, y) coordinate plane?