Ascientist conducted an experiment to determine whether an organic cleaner is as effective as a non-organic cleaner in killing germs that cause colds and the flu. to conduct the experiment, the scientist randomly selected 50 doorknobs in a hospital. he cleaned 25 of the door knobs with the organic cleaner, and he cleaned the remaining 25 door knobs with the non-organic cleaner. after cleaning and testing all of the doorknobs, the scientist reported that the organic cleaner killed 90% of germs that cause colds and the flu on the doorknobs, while the non-organic cleaner killed 95% of germs that cause colds and the flu on the doorknobs. what can be concluded from the scientist's report?

The sample taken is random and grouped. 50% doorknobs were cleaned with organic cleaner and 50% were cleaned with non organic cleaner.

It was reported that organic cleaner killed 90% of germs while the non-organic cleaner killed 95% of germs.

Therefore, the following conclusions can be made.

The organic cleaner is 90% effective  and the non-organic cleaner is 95% effective.

The non-organic cleaner is more effective in killing germs as compared to organic cleaner in killing germs that cause colds and the flu.

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

step-by-step explanation: