1-5 skills practice
descriptive modeling and accuracy
1. test scores a teacher compares the ratio of the number of questions answered correctly to the
total number of questions on a test as a metric. for a student to earn and a or b on a test, the ratio
must be greater than or equal to 0.8. the last test given by the teacher had a total of 40 questions.
using this metric, what is the least number of questions a student can answer correctly and earn an
a or b on the test?
number of questions answered correclty
ratio to earn an a or b - -
number of questions

The least number of questions a student can answer correctly is 32

Step-by-step explanation:

Let

x -----> the number of questions answered correctly

y ----> the  total number of questions on a test

we know that

For a student to earn and A or B on a test, the ratio  must be greater than or equal to 0.8

so

For y=40 questions

Find the value of x

substitute

solve for x

Multiply both sides by 40

so

The least number of questions a student can answer correctly is 32

Verify the ratio

For x=32, y=40

Compare

----> is ok

"it's not the heat, it's the humidity".   that's a partly valid phrase you may have heard in the summer, but it's actually both.   the heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature.   this has important considerations for the human body's comfort.   when the body gets too hot, it begins to perspire or sweat to cool itself off.   if the perspiration is not able to evaporate, the body cannot regulate its temperature.   evaporation is a cooling process.   when perspiration is evaporated off the body, it effectively reduces the body's temperature.   when the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases.   in other words, the human body feels warmer in humid conditions.   the opposite is true when the relative humidity decreases because the rate of perspiration increases.   the body actually feels cooler in arid conditions.   there is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).

step-by-step explanation:

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!