A science class investigated the relationship between the amount of time students spend doing chore every night and their average grades on school work. Which statement from the lab report best represents a conclusion ? A. Doing chores at night actually helps students do better at school, even if it seems like the opposite would be true
B. We believe the students should spend at least 2 hours doing chores every night if they want to get better grades at school and help their families
C. Based on our results , students who do 1 hour chores per night have grades that are on average 0.2 points higher than students who do no chores
D. If students spend at least 1 hour o chores , then there are guaranteed to get higher grades on there schoolwork

When using two-wire cable to feed a 240-v appliance that does not require a neutral wire, you should a. mark both ends of the white wire green. b. use the cable as is. c. use only the black wire. d. mark both ends and any exposed area of the white wire black.

Comedians like to joke that the reason we haven’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earth’s broadcasts of intellectually embarrassing tv programs, like gilligan’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. let’s check the assertion that aliens could have been receiving them. tv programs are broadcast at a frequency of about 100mhz with about 100kw of total power in 30frames per second, which emanatesroughly uniformly in all directions. assume that interstellar space transmits these broadcasts without attenuation. no matter how smart they are, aliens would require at least one photon per frame to interpret our signals. findthe number of photons per unit time per unit area reaching a receiver on a possible planet in the nearest star system, which is about 4 light-years away (a light-year is the distance light travels in a year). if aliens aimed a receiver or detector directly at earth, how big (in diameter) would it have to be to receive a photon per frame

Explain what will happen if decomposers were apsent from a forest ecoysystem.