If u varies directly with v, with k = 0.6, what is the value of u when v = 7.8?
A.
u = 13
B.
u = 0.77
C.
u = 0.468
D.
u = 4.68
u = kv = 0.6 * 7.8 = 4.68
To solve this problem, we can use the formula for direct variation:
u = k * v
where u is the value of u, v is the value of v, and k is the constant of variation.
We are given that k = 0.6 and v = 7.8. To find u, we can substitute these values into the formula:
u = 0.6 * 7.8
Calculating this, we find:
u = 4.68
Therefore, the value of u when v = 7.8 is u = 4.68.
Therefore, the correct answer is D. u = 4.68.
To solve this problem, we can use the formula for direct variation, which states that u = kv, where k is the constant of variation.
Given that k = 0.6 and v = 7.8, we can substitute these values into the formula to find the value of u.
u = k * v
u = 0.6 * 7.8
To find the value of u, we can multiply 0.6 by 7.8:
u = 4.68
Therefore, the value of u when v = 7.8 is u = 4.68.
Therefore, the correct answer is:
D. u = 4.68