Jessica is running a 10k. she alternates between running and walking each kilometer. she runs at a rate of 1 kilometer every 5 minutes. she walks at a rate of 1 kilometer every 15 minutes. how long does it take her to complete the race?

It  takes Jessica 100 minutes to complete the race

Explanation:

Given:

Total distance = 10 km

Runs for 1 km every 5 minutes

walks 1 km every 15 min

Explanation

It is given that she alternates between walking and running

so Jessica will walk 5 km and run 5 Km

Time taken by Jessica for walking

she walks 5 km

time taken to walk 1 km = 5 minutes

now time taken to walk 5 km

=> 5 X 5

=>25 minutes

Time taken by Jessica for Running

she Runs 5 km

Time taken to run 1 km = 15 minutes

Now time taken to run 5 km

=> 5 X 15

=>75 minutes

Total time taken   = Time taken by Jessica for walking + Time taken by Jessica for Running

=>25 minutes +75 minutes

=> 100 minutes

a. possible errors

d. new questions

explanation:

predictions and planning happen before. a summery comes after. errors you get after investigation and new questions propose what you can look for in the future.

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation: