Answer:
a. Types of computer software used in a database management system. =Qualitative
b. Life-lengths of laser printers =Quantitative
c. Brands of calculators used by 100 engineering students on campus =Qualitative
d. Mileage attained by 12 automobiles powered by alcohol= Quantitative
Step-by-step explanation:
Data is described as quantitative when it deals with numeric values whereas qualitative data is categorical in nature. Quantitative data tells us how much, how many, or the frequency of occurrence of certain variables. Qualitative data provides answers to the what, why, which, and where questions.
1. Types of computer software are not numeric variables as they answer the 'what' question.
2. Length deals with numbers, so the life-lengths of laser printers is a quantitative variable.
3. Brands of calculators are categorical data and are thus qualitative.
4. Mileage is a numerical variable and is thus quantitative.
Answer:
Step-by-step explanation:
We know that the parabola faces downard, and hence must have a negative first term, so that eliminates the first and third options.
The vertex of the parabola has an x-value of 2, so it must be of the form 
.
Combining these, we have that the answer is 
Answer:
114.8 cm^2
Step-by-step explanation:
<h2><u>Finding the area of the shape </u></h2>
we can break down this figure into individual shapes :
- rectangle
- triangle
- parallelogram
<h3><u>area of a triangle</u></h3>
formula:
<u>area of a triangle =25.2 cm^2</u>
<u />
<h3><u>area of a rectangle</u></h3>
formula:
4.5 * 8
<u>area of a rectangle = 36 cm^2</u>
<u />
<h3><u>area of parallelogram</u></h3>
formula:
1/2 * ( sum of parallel sides ) * height
1/2 * ( 8 + 8 ) * 6.7
<u>area of a parallelogram = 53.6 cm^2</u>
<u />
<h3><u>Total area</u></h3>
= area of rectangle + area of triangle + area of parallelogram
= 25.2 + 36 + 53.6
<h2><u>= 114.8 cm^2</u></h2>
Answer:
390
Step-by-step explanation:
Only two varieties are involved: yellow and purple.
We know the ratio of yellow iris bulbs over the total is 2:5, so 40%.
That leaves 60% of the sales for the purple bulbs.
purple = (60% / 40%) * 260 = 1.5 * 260 = 390.
So, they sold 1.5 times more purple bulbs than yellow ones.
In total, the store sold 650 bulbs last year, and we hope they sell more this year.
