Express the following sums using sigma notation.
a. 9 plus 10 plus 11 plus 12 plus 13
b. 2 plus 4 plus 6 plus 8 plus 10 plus 12
c. 1 superscript 6 baseline plus 2 superscript 6 baseline plus 3 superscript 6 baseline plus 4 superscript 6
d. one fifth plus one sixth plus one seventh plus one eighth

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?

Someone answer this asap for gabriella uses the current exchange rate to write the function, h(x), where x is the number of u. s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a. gabriella averages 7.5 u. s. dollars for every 100 euros. b. gabriella averages 100 u. s. dollars for every 25 euros. c. gabriella can exchange 75 u. s. dollars for 100 euros. d. gabriella can exchange 100 u. s. dollars for 75 euros.