3.PRACTICE Complete with the Past Simple or the Present Perfect
Simple of the verbs in brackets.
Paul I can't wait to go to Warsaw next week.
Larry Sounds great! (1)
you
(visit) Poland before?
Paul No. Actually, I (2)
(never / leave)
the country, but I (3)
(always /
1

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

If value of cos330° is √3/2 then find tan165°.