What is 3.868x10^9 in standard form

At a parade, 1/4 of the participants have red hair, 1/6 of them have brown hair, and the rest have black hair. What fraction of the participants have black hair

Bill estimates that 20 people will attend the seminar if it does not rain and 12 people will attend if it rains. The weather forecast indicates a 40% chance it will not rain and a 60% change it will rain on the day of the seminar.

63. At a party, three friends, Ashley, Cole, and Lauren, shared a big tub of popcorn. Within 30 min, the tub was empty. Ashley ate 712 of the tub while Lauren ate only 16 of the tub. How much did Cole eat? and how do I solve this

Sarah cut 4 yards of ribbon from a spool. How much did she cut in inches?

What is the decimal equivalent of this percent? 861%

Information about the five planets

A rectangular prism has a volume of 100 cubic meters. One of the dimensions is 5 meters. Which pair of measurements could be the other two dimensions of the prism? 1. length = 5 meters, width = 4 meters 2. length = 5 meters, width = 5 meters 3.

There are five people sitting around the dinner table. Each person has 2/10 of a pie on their plate. How much pie is left? Explain

Aria is going to a carnival that has games and rides. Each game costs $3.50 and each ride costs $5. Aria spent $42 altogether at the carnival and the number of rides she went on is 5 more than the number of games she played.

An urn contains 9 red balls and 8 green balls. if vince chooses 11 balls at random from the urn, what is the probability that he will select 5 red balls and 6 green balls?