(2.8×10⁸)⁴×(1.6×10⁶)÷2.1×10¹⁵,what' s the answer in scientific notation correct to 3 significant figures?​

John bought 5 lemons and used 2 of them for a salad how much did he use for.a salad . he used % of the lemons.

The equation of a circle is (x - 3)2 + (y - 7)2 = 25. determine the length of the radius. 4 25 12.5 5 write the standard equation of the circle with center (2, 3) and a diameter of 12. (x - 2)2 + (y - 3)2 = 36 (x + 2)2 + (y + 3)2 = 12 (x - 2)2 + (y - 3)2 = 6 (x - 3)2 + (y - 2)2 = 36 the equation of a circle is (x + 3)2 + (y + 7)2 = 25. where is (3, 4) located in relation to the circle? on the circle in the interior of the circle in the exterior of the circle at the center of the circle

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?