Find the sum of the first 8 terms of the geometric series if a1=1 and r=2

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?