How many known elements exist? PL HELP PL A. about 100
B. fewer than 50
C. exactly 75
D. 1,000

When two or more atoms link together they are called .

A. a shell
B. an electron
C. a molecule
D. a cluster

Mass is .

A. the length of an atom’s nucleus
B. the center of a compound
C. another name for mixtures that go together
D. the amount of matter in an object

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

Plz.yesterday, the snow was 2 feet deep in front of archie’s house. today, the snow depth dropped to 1.6 feet because the day is so warm. what is the percent change in the depth of the snow?

Evaluate the expression. (9 + 5)(3 + 2)0