Answer:
Step-by-step explanation:
If you are rounding to nearest tenth
2.6 1.9
Nearest hundredth
2.6 1.87
If the number to the right of the one you want to round is 5 or above, you go up a number. If it's below, you go down 1.
Hope this helps.
Answer:
Test statistic,
(to 3 dp)
Step-by-step explanation:
Deviation, d = x -y
Sample mean for the deviation


Standard deviation: 


SD =2.93
Under the null hypothesis, the formula for the test statistics will be given by:




multiply both sides by .4 to isolate the x variable.

x = 1.6
SA=(a+b+c) h+bh
=(5+12+13)*4+5*12
=20*4+60
=80+60
=140 cm squared