What is meant by "double fertilization"?

Two cars leave a town at the same time and travel at constant speeds along straight roads that meet at an angle of $60^{\circ}$ in the town. If one car travels twice as fast as the other and the distance between them increases at the rate of 45 mi/h, how fast is the slower car traveling?

Name the compound: $\mathrm{HBrO}_3$

If the radius of a circle doubles, will the measure of a sector of that circle double? Will it double if the arc measure of that sector doubles?

How many seasons does the alpine biome have?

For the following, determine whether the sequence is geometric. If so, find the common ratio.

$$5,5.2,5.4,5.6,5.8, \ldots$$

What is the name of the compound with the formula PbO.

Suppose that you have an electron moving with speed comparable to the speed of light in a circular orbit of radius r in a large region of uniform magnetic field B. Now the uniform magnetic field begins to increase with time: $B=B_{0}+b t,$ where $B_{0}$ and b are positive constants. In one orbit, how much does the energy of the electron increase, assuming that in one orbit the radius doesn't change very much?

What are compound words with -thing in them?

Calculate the double integral. double integral xsin(x+y)dA, R=[0, pi/6]x[0, pi/3]

In a circle, chord $\overline{\mathrm{AB}}$ is 325 cm long and chord $\overline{\mathrm{CD}}$ is $3 \frac{1}{4}$ m long. Which is closer to the center?

Draw a square and its inscribed and circumscribed circles. Find the ratio of the areas of these two circles.

Explain why a compound is classified as a substance.

Planet X orbits the star Omega with a "year" that is 200 earth days long. Planet Y circles Omega at four times the distance of Planet X. How long is a year on Planet Y?