Answer:
7 cards
Step-by-step explanation:
Well if John started off with 28 and gave away 10,
28-10=18
Gave tthe last 18 to his brother
18-18 = 0
Gained 10
0+10=10
Lost 3
10-3=7
Hence, John has 7 cards left.
To find the acceleration we divide the change of velocity by the change of time.
Change of velocity: 4 m/s
Change of time: 2 s
Acceleration =

So the answer: his acceleration is
2 m/s^2
Answer:
D
Step-by-step explanation:
When the population standard deviation is unknown while constructing the confidence interval then the estimate of standard deviation calculated from sample is used and due to this the new type of variability arise and then for conducting a confidence interval for mean the t-distribution is used. For calculating confidence interval for mean there are two sampling distributions z distribution and t distribution. When sample size is small and population standard deviation is unknown then t-distribution is used.
Five sos tha of sum of three. = -237.5