1.Patrick has joined an insurance plan.If he pays $1888 each

1.
Patrick has joined an insurance plan.If he pays $1888 each month for the plan,how much will he play in total after 3 years?(Give your answer correct to 2 significant figures.)
2.
It is given that 1 foot = 12 inches.If 5 feet =152.5cm,how many centimetres are there in inch?(Give you answer correct 3 significant figures .)
3.
Bill finished 5 IQ questions in 18.5 s,22.7 s,37.2 s and 44.6 s.If ge expected to finish all the 5 questions in 3 minutes originally,estimate whether the actual time used exceeded his expectation.Explain briefly.
4.
There are 36 pages in a grid book with 12 rows each page and 13 grids each row.Estimate whether the total numbers of grids of 40 grid books is more than 100 thousand.Explain briefly.
懂其中一条的也可以回答……
最好是以英语的方式……不是的也可以……
3.
Bill finished 5 IQ questions in 18.5 s,22.7 s,29.8 s,37.2 s and 44.6 s.If he expected to finish all the 5 questions in 3 minutes originally,estimate whether the actual time used exceeded his expectation.Explain briefly.
= =+的确是少了一个