Before the parachute opens, the velocity v (in meters per second) of a skydiver is given by , where t is time in seconds into the jump. After t seconds, a certain falling object has a velocity v given by

variablename="impvar_41631cc6bbec485098a789628" />. What is the difference in their velocities after 27 seconds? Round to two decimal places.
?

A. 9.81 m/sec
B. 5.60 m/sec
C. 0.17 m/sec
D. 9.00 m/sec
E. 9.17 m/sec

---

Answer: E

Mathematics

Two measurements are given. Find the absolute difference and then find the relative difference as a percentage. Assume that the first quantity is the compared value and the second quantity is the reference value. Round answers to the nearest tenth if necessary.In a certain country, the life expectancy for men is 70.6 years while the life expectancy for women is 75.7 years.

A. Absolute difference: 5.1 years Relative difference: 7.2% B. Absolute difference: -5.1 years Relative difference: -7.2% C. Absolute difference: -5.1 years Relative difference: -6.7% D. Absolute difference: -5.1 years Relative difference: -0.7%

Evaluate the expression.3

A.
B. 3 
C.  
D.  

A. no solution; ? B. {(3, 1)} C. {(1, 3)} D. {(2, 14)}

Multiply. Simplify by combining like terms.(m2 + 0.4n)(m2 - 0.4n)

A. m4 - 0.16m - 0.16n2 B. m4 - 0.16n2 C. 2m4- 0.8n2 D. m4 + 0.16n2