A bottle of shampoo is shaped like a right cylinder. The cylinder is six inches high with a radius of 0.9 inches. One cubic inch is the same as 16.4 milliliters. What is the capacity of the bottle in
milliliters? Round to the nearest whole number. Use the following formula to help you decide:
Vegy = 17p• where Vcy is the volume of a right cylinder, ne is about 3.14, ris the radius
of the base, and h is the height of the cylinder
A 250 ml
B 200 ml
C 150 ml
D 100 ml

A) 250 ml

Explanation:

Vcyl= π • r2 • h > Vcyl= π· 0.9^2 · 6=  15.2681402964464 x 16.4 millimetres = 250.3975008617209 rounded off to 250 millimetres :)

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.