1. 8.64 x 10^6 4.32 x 10^3 2. (9.67 x 10^6) + ( 3.45 x 10^5) 3. (2.82 x 10^9) + (6.3 x 10^7) 4. (3.64 x 10^7) - (2.18 x 10^4) 5. 2.144 x 10^7 3.2 x 10^4 15 points each

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.