From the given figure

Since XY = 5.1 and XZ = 7.7, then

To find x, use the inverse of cos

Use the calculator to find x

The answer is
I think it’s the second one
the number is 6 so we round up to 9.7 s
I hope that help .
Answer:
3/10
Step-by-step explanation:
An hour is 60 mins
so the fraction would be 18/60
Then you can divide both numbers by 6 to 3/10
Answer:
828
Step-by-step explanation: