Blank : 12 = 7: 14 -fill in the blank to make an equivalent ratio- show work im confused

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap