Which answer represents the series in sigma notation?

1+13+19+127+181+1243+1729

a. ∑j=1713j+1

b. ∑j=173j−1

c. ∑j=1713(j+1)

d. ∑j=17(13)j−1

How many grams must be adde to 970g to make 1 and a half kg

What is the order of operations for 2 + (3 - 9) ÷ -3 · 4 in number order 1. subtraction 2. division 3. addition 4. multiplication

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years