Lilly and Ian are reading two different books but are competing to see who finishes their book first. The equation p=314−17d represents the number of pages (p) Lilly has left in her book after each day (d) of reading. After 10 days of reading, Ian has 210 pages left in his book. After 4 more days, he has 130 pages left. How many pages are in Ian's book?

A.343
B.410
C.210
D.77

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.