Answer these questions! will give brainliest

with the upcoming presidential election, ira decided to create a survey to find out who might win. he carefully created a valid survey and gave it to five of his closest friends. he then tallied the results from the surveys and published his data in the school newspaper. which of these would be a reason why ira's results are not valid?
a) the survey was not good enough.
b) the sample size of five was too small.
c) there is not problem; the results are valid.
d) he only published his data in a school newspaper.

an apartment being treated for roaches was sprayed with a pesticide. in the graph, the number of roaches seen each day was plotted each day after the treatment. day 0 represents the day before the apartment was treated. what can you conclude from the graph?
a) more roaches seen on day 5 than on day 1.
b) more roaches seen on day 2 than on day 19.
c) the treatment was only effective as a short-term solution.
d) the treatment was an effective long-term solution to the problem.

students in ms. ramon's class are studying about forces. each student group had an investigation to complete before engaging in a whole-class discussion. here is sam and kai's investigation.
1. assemble a balsa wood plane for each member of the group.
2. quietly take the plane out into the hall.
3. see which one of you can fly the plane the farthest (1 try
4. what forces are at work, first causing the plane to fly, second, causing the plane to stop?
5. does a force contribute to your individual differences in flight distance?
6. fly the planes again, one try each, but this time record the speed of your planes.
7. does a force contribute to any differences in speed? explain.
sam and kai assembled the planes and were all set to begin their investigation. "wait a minute! we do not have any lab equipment to collect our data," noticed kai. what tools should the boys use to complete the investigation on forces. how should the tools be used?
a) the boys need a meter stick to measure the distance the planes fly in both cases.
b) since the boys are measuring force they need a spring scale. they also need a meter stick to measure distance.
c) the boys need a meter stick to measure distance; they need a stop watch to time the planes in order to calculate speed for the second trial.
d) in both trials the boys should time the flight using a stop watch. they should use a spring scale in the first trial and a meter stick in the second trial because speed equals distance/time.

maria and sara wanted to see how light affects plant growth. they are growing a plant in class. they put their plant into a dark box with a small hole in the top of it. then they put a bright light over the box. predict how the plant will grow.
a) down, toward the ground
b) sideways, inside the box
c) up, through the hole, to the light
eliminate
d) up to the top of the box, then stopping

you should not eat in the laboratory except for this one reason.
a) you get permission.
b) you haven't eaten all day.
c) you should never eat in the lab, no exceptions.
d) the experiment doesn't involve dangerous chemicals.

what is the volume of the liquid?
a) 13.0 ml
b) 13.5 ml
c) 14.0 ml
d) 17.5 ml

as water enters this plant cell structure, the cell becomes more turgid. this plant cell structure is the
a) vacuole.
b) cytoplasm.
c) cell wall.
d) chloroplast.

the picture above is that of a typical plant cell. notice the cell wall. the cell wall's main function is to give rigidity and strength to the plant. this allows plants to grow tall instead of laying flaccid on the ground.
compare the cell wall of the plant cell to the human body. which system is most similar to the cell wall in function?
a) nervous system
b) skeletal system
c) digestive system
d) cardiovascular system