Answer:
a
Step-by-step explanation:
Here the NULL hypothesis will be difference in weeks at which baby is delivered is zero between groups of women who were exposed to air pollution and group of women who were not exposed to air pollution
I cannno t see that picture bud butttt hope this helps it is 643222 + ( . ) = 2
Answer:
there are thirty kids in the class
Step-by-step explanation:
there are two boys to three girls so 18 divided by 3 is 6. 2 times 6 is 12. 12 plus 18 is 30.
Answer:
length = 16m
width = 4m
Step-by-step explanation:
1. if the length is 4 times the size of the width then we can call the width x and the length is 4x
2. make an equation 4x + 4x + x + x = 40m
3. solve the equation 10x = 40 x = 4
4. width = x width = 4m length = 4x length = 16m
5. check this 16 + 16 + 4 + 4 = 40