Answer:
The scale drawing is 20 units by 4 units
Step-by-step explanation:
20/5 = 4
100/5 = 20
Answer:
5/12
Step-by-step explanation:
Answer:
3.24 minutes
Step-by-step explanation:
Use a calculator or chart to find the z-score.
P(Z > z) = 0.60
P(Z < z) = 0.40
z = -0.253
Find the time associated with the z-score.
z = (x − μ) / σ
-0.253 = (x − 4) / 3
x = 3.24
The two numbers are very near 7200 and 300. The sum of those is a good estimate of your sum:
... 7200 + 300 = 7500
_____
If you're taught methods of addition that include "make a ten" or "make a hundred", you know you can "borrow" a 1 from 7203 (making it 7202) and loan that 1 to 299 to make it 300. Now, you know your sum is exactly 7202+300 = 7502, with no estimation necessary.
Answer:
√
42 lies between 6 and 7
Step-by-step explanation:
We know that √
42 will lie between √
36 and √
49
And √
36
=
6 ; √
49
=
7
Hence we can be sure that √
42 lies between 6 and 7
