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4 years ago

What is the surface area of the triangular prism?

Mathematics

1 answer:

Stolb23 [73]4 years ago

5 0

Answer: 252

Step-by-step explanation:

A triangular prism has three rectangular sides and two triangular faces. To find the area of the rectangular sides, use the formula A = lw, where A = area, l = length, and h = height. To find the area of the triangular faces, use the formula A = 1/2bh, where A = area, b = base, and h = height.

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An experiment has a high degree of ______________ when it shows convincingly that changes in behavior are a function of the inde

adelina 88 [10]

The answer is Internal Validity.

Internal Validity is high in an experiment. when it demonstrates persuasively that changes in behavior are caused by the independent variable and not by unknown factors.

What is Internal Validity?

Internal validity is defined as the degree to which the observed results represent the truth in the population under investigation and are not the consequence of methodological flaws.
Internal validity is the degree of certainty that the causal link being examined is reliable and unaffected by other factors or variables.
The extent to which study results may be extended (generalized) to other contexts, groups, or events is referred to as external validity.

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1 year ago

The choice between a z-test and a t-test for a population mean depends primarily on:

Tom [10]

Z-test should be used when the parent standard deviation is known and the sample size is greater than or equal to 30 (to satisfy the Central Limit Theorem). A T-test should be used when these two rules do not apply.

6 0

3 years ago

A ball is launched upward from a height 40 feet above ground level. The ball’s height at t seconds is given by -16t^2=128=40 .

Nesterboy [21]

Answer:

The ball will be at 100 feet at time x=0.5 sec and at time x=7.5 sec

Step-by-step explanation:

<u><em>The correct question is</em></u>

A ball is launched upward from a height 40 feet above ground level. the ball's height at t seconds is given by h(t)=-16t^2+128t+40 At what time(s) will the ball be at 100 feet?

we have

$h(t)=-16t^{2}+128t+40$

For h(t)=100 ft

substitute in the equation and solve for x

$-16t^{2}+128t+40=100$

$-16t^{2}+128t-60=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16t^{2}+128t-60=0$

$a=-16\\b=128\\c=-60$

substitute in the formula

$x=\frac{-128(+/-)\sqrt{128^{2}-4(-16)(-60)}} {2(-16)}$

$x=\frac{-128(+/-)\sqrt{12,544}} {-32}$

$x=\frac{-128(+/-)112} {-32}$

$x=\frac{-128(+)112} {-32}=0.5$

$x=\frac{-128(-)112} {-32}=7.5$

therefore

The ball will be at 100 feet at time x=0.5 sec and at time x=7.5 sec

7 0

3 years ago

Given f(x)=2x+3 and g(x)=x^2-5, find the following

dalvyx [7]

a) 13

b) 0

c) 1

d) 4/9

<h3>What is function?</h3>

An expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable)

Given:

f(x)= 2x+3 and g(x)= x²-5.

a) (f+ g)(3)

= f(3)+ g(3)

= 2(3)+3 + (3)²-5

=6+3+9-5

=13

b) (f-g)(4)

= f(4)- g(4)

= 2(4)+3 - (4)²+5

=8+3-16+5

= 0

c) (fg)(-2)

= f(-2)*g(-2)

=[ 2(-2)+3][(-2)² -5 ]

=(-1)(-1)

= 1

d) (g/f)(3)

= g(3)/f(3)

= 3²-5/ 2(3)+3

= 4/9

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2 years ago

Perpendicular distance between the base of a triangle and the opposite vertex is called _____of the triangle

Solnce55 [7]

Answer:

Median might be the answer or maybe the height?

5 0

3 years ago

Read 2 more answers