How high must a vehicle's gas mileage be in order to fall in the top 15% of all vehicles?

the brand manager for a toothpaste brand must plan a campaign designed to increase brand recognition. H1e wants to first demonstrate the percentage of adults who have heard of the product. How many adults must he survey in order to be 95 percent confident that his estimate is within 5 percentage points of the true population percentage? n=?

Sam wants to take his music player and his video game player on a car trip. An hour before they planned to leave, he realized that he forgot to charge the batteries last night. At that point, he plugged in both devices so they can charge if possible before they leave. Sam knows that his music player has 40% of its battery life left and that the battery charges by an additional 12 percentage points every 15 minutes. His video game player is new, so Sam doesn’t know how fast it is charging but he recorded the battery charge for the first 30 minutes after he plugged it in. a. If Sam’s family leaves as planned, what percent of the battery will be charged for each of the two devices when they leave?

3/11% of a quantity is equal to what fraction of the​ quantity?

Supposed that in the past, 10% of women in the Philippines have severe dysmenorrhea. Do we have enough reason to believe that the proportion of women having terrible cramps has decreased if, in a random barangay population of 1,256 women, 122 have severe enough cramping to interfere with their daily lives? Use a = 0.05

Worried about going over her storage limit, Wendy monitored the number of undeleted voicemail messages stored on her phone each day. Voicemail messages on Wendy's phone Day Voicemail messages Tuesday 19 Wednesday 8 Thursday 13 Friday 9 Saturday 22 According to the table, what was the rate of change between Thursday and Friday? voicemail messages per day

An investment earns 4% per year and is worth $10,000 after 7 years. PV =

Empathy means being able to understand what others feel. To see how the brain expresses empathy, researchers recruited 16 couples in their midtwenties who were married or had been dating for at least two years. They zapped the man's hand with an electrode while the woman watched, and measured the activity in several parts of the woman's brain that would respond to her own pain. Brain activity was recorded as a fraction of the activity observed when the woman herself was zapped with the electrode. The women also completed a psychological test that measures empathy. Subject 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Empathy Score     43 46 35 59 64 66 58 47 44 49 56 68 28 71 27 108 Brain Activity -0.129 0.389 0.019 0.378 0.016 0.419 0.109 0.515 0.149 0.746 0.245 0.57 0.219 0.716 0.364 0.762 Given that the equation for the regression line is y^=0.00709x−0.04187y^=0.00709x−0.04187, what is the residual (or deviation), yi−y^iyi−y^i, for subject 14?ANSWER:    Speak

Amherst had a population of 45000 in 2018. Over each of the last 6 years, the city's population has grown at a consistent rate of 4.95% annually.What was the city's population in 2012?

A radioactive material decomposes at a rate proportional to the amount present. If three-fourths of the original amount of material disappears in 400 years, a. Find the percentage of the material lost in a score b. Find the percentage of the material lost in 7 scores