1.45 x 10^-7 isn't in scientific notation because if it's negative, the decimal starts before the first real number, right?
Answer:
Option B 1.5 min
Step-by-step explanation:
we know that
1 mi=1,609.36 m
1 h=60 min
so
using proportion
Answer:
The correct option is option (c).
Sin \ P= \frac {RQ}{PQ}
Step-by-step explanation:
The area would be 800 inches!!
I hope this helped
please mark this as the brainiest I need it!
The given data is
Scores: 90-99 80-89 70-79 60-69 50-59
Students: 3 7 12 4 4
Because we are to take the middle value for each group.
Therefore the total score is
Sx = 3*94.5 + 7*84.5 + 12*74.5 + 4*64.5 + 4*54.5 = 2245
The number of students is 3+7+12+4+4 = 30
The mean is
m =2245/30 = 74.833
Calculate (Sx - m)²
(Sx - m)² = 3*(94.5-74.833)² + 7*(84.5-74.833)² + 12*(64.5-74.833)²
+ 4*(64.5-74.833)² + 4*(54.5-74.833)² = 3896.7
Calculate the standard deviation
s = √(3896.7/29) = 11.592
Answer:
mean = 74.83
std. deviation = 11.59
