A number line going from negative 4 to positive 4. A is at negative 3, B is at negative 2, C is at positive 2, and D is at positive 3.
Which point on the number line represents a drop in temperature of 3 degrees?
A
B
C
D

Can someone answer these problems for me

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236