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3 years ago

HELP PLEASE I NEED HELPPPP

Mathematics

1 answer:

nlexa [21]3 years ago

3 0

Answer:

174 inches squared

Step-by-step explanation:

First, we have to remember what the area of a triangle is:

$\frac{base*height}{2}$

Since there are 4 of the same triangle, multiply the area of one triangle by 4:

$\frac{10*8.7}{2}$

$\frac{87}{2}$

$43.5$

$43.5(4)=174$

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Suppose you want to estimate the proportion of traditional college students on your campus who own their own car. From research

Lapatulllka [165]

Answer:

2,655 students

Step-by-step explanation:

The z-score for a 99% confidence interval is z = 2.576

The standard error for a proportion p is:

$SE = z*\sqrt{\frac{p*(1-p)}{n} }$

For a proportion of p =0.20, in order to ensure a standard error of 0.02, the sample size 'n' must be:

$0.02 = 2.576*\sqrt{\frac{0.2*(1-0.2)}{n}}\\n=2,654.31$

Rounding up to the next whole student, the sample size needed is 2,655 students.

5 0

3 years ago

15 deliveries in 5 hours = deliveries per hour

lyudmila [28]

Answer:

3 deliveries per hour

Step-by-step explanation:

$\frac{15}{5} = 3 \: deliveries \: per \: hour$

8 0

4 years ago

Read 2 more answers

Find the area .............

Natali5045456 [20]

Answer:

Area of the Trapezoid is= $13.5cm^2$

Step-by-step explanation:

The given figure is in the shape of a trapezoid:

Area of a trapezoid= (1/2)*(Sum of parallel opposite sides)* (Distance between the parallel sides)

The parallel sides are: 6 cm and 3 cm

Distance between parallel sides= 3 cm

Area:

$=\frac{1}{2} *(6+3)*3\\\\=\frac{1}{2}*9*3\\\\=\frac{27}{2} \\\\=13.5 cm^2$

Area of the Trapezoid is= $13.5cm^2$

5 0

4 years ago

a bag contains colored gumdrops 5 are cherry 3 are strawberry 2 are grape. a gumdrop will be randomly selected from the bag what

weqwewe [10]

Answer:

probablity of grapes = 0.2

Step-by-step explanation:

here's the solution : -

probablity of grapes =

$\frac{number \: of \: grapes}{total \: fruits}$

=》

$\frac{2}{2 + 3 + 5}$

=》

$\frac{2}{10}$

=》

$0.2$

6 0

3 years ago

X+Y=4 ? I think math

ryzh [129]

The answer for both is 2

4 0

3 years ago