which of the following is a Quadrilateral which must contain diagonals that are always congruent and must always have 90° angles?

Answers

Answer 1

Answer:

Answer: B

Step-by-step explanation:

Related Questions

A fox leaves its den and travels 725 yards northeast, then 950 yards west. How far, in yards is the fox from its den
Line A: y = 1/2 x + 2 Line B: y = - 1/2 x + 7Line C: y = 2x + 4 Line D: y = 1/2 x + 5/4Which lines are parallel?A) A and B B) A and C C) B and C D) A and D
What is the number in scientific notation ? 0.000000000093
What is the domain of the function f (x) = StartFraction x + 1 Over x squared minus 6 x + 8 EndFraction?
Simplify the polynomial

a model rocket is fired straight up from the ground. The heigth of the rocket (in feet) at any time T (in seconds) can be modeled by the equation h= -16t^2+ 128 when will the height of the rocket be 240feets from the ground.

Answers

The height is modeled by,

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

Where

t is time in seconds

We want to find the time, t, rocket will be 240 feet above the ground.

So we will substitute 240 into h(t) and find the corresponding value of "t".

The steps are shown below:

$\begin{gathered} h(t)=-16t^2+128 \n 240=-16t^2+128 \n 16t^2=112 \n t^2=7 \n t=\sqrt[]{7} \end{gathered}$

Square root of 7 is approximately 2.65 seconds.

So,

Answer2.65 seconds

Laws have been instituted in Florida to help save the manatee. To establish the number of manatees in Florida, manatees were tagged. A new sample was taken later, and among the manatees in the sample, were tagged. Approximate the number of manatees in Florida. brainly

Answers

Answer:

It think this should be the complete question: Laws have been instituted in Florida to help save the manatee.To establish the number of manatees in Florida, 150 manatees were tagged. A new sample was taken later, and among the 40 manatees in the sample, 3 were tagged. Approximate the number of manatees in Florida.

The approximate number of manatees in Florida is 2,000

Step-by-step explanation:

To solve this problem, we will use the formula

N= (C*R)/M

Where N is the toal estimated population

C is the total first capture

R is the total recapture after the first

M is the total tagged from recapture

Thus, we have:

N = (150*40)/3

N = 6000/3

N= 2,000

So, the approximate manatee is $2000$ .

Ratio and Proportion:

Ratio and Proportion are explained majorly based on fractions. When a fraction is represented in the form of $a:b$ , then it is a ratio whereas a proportion states that two ratios are equal. Here, a and b are any two integers. The ratio and proportion are the two important concepts, and it is the foundation to understand the various concepts in mathematics as well as in science. the proportion is represented by,

$(a)/(b)=(c)/(d)$ .

Let us assume $x$ represents the unknown observed manatee, which is actually total manatees so the proportion is, $(40)/(3)=(x)/(150)$ .

Now, cross multiplying the given proportion as,

$3x=40* 150\nx=(40* 150)/(3) \nx=2000$

Learn more about the topic Proportion: brainly.com/question/24320792

A manufacturer of college textbooks is interested in estimating the strength of the bindings produced by a particular binding machine. Strength can be measured by recording the force required to pull the pages from the binding. If this force is measured in pounds, how many books should be tested to estimate the average force required to break the binding to within 0.08 lb with 99% confidence? Assume that σ is known to be 0.72. (Exact answer required.)

Answers

Answer:

538 books should be tested.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = (1-0.99)/(2) = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*(\sigma)/(√(n))$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How many books should be tested to estimate the average force required to break the binding to within 0.08 lb with 99% confidence?

n books should be tested.

n is found when $M = 0.08$

We have that $\sigma = 0.72$

$M = z*(\sigma)/(√(n))$

$0.08 = 2.575*(0.72)/(√(n))$

$0.08√(n) = 2.575*0.72$

$√(n) = (2.575*0.72)/(0.08)$

$(√(n))^(2) = ((2.575*0.72)/(0.08))^(2)$

$n = 537.1$

Rounding up

538 books should be tested.

The probability that the first production line stops is 0.5 while the probability that the second production line stops is 0.22 . If the production lines work independently of each other what is the probability that both lines are working at any given time ?

Answers

Answer:

0.11

Step-by-step explanation:

The events are independent, so:

P(A and B) = P(A) × P(B)

P = 0.5 × 0.22

P = 0.11

In AWXY, X = 700 cm, w = 710 cm and ZW=24°. Find all possible values of ZX, tothe nearest 10th of a degree.

Answers

Answer:

{}

Step-by-step explanation:

Data Entry - No Scoring During your procedure to determine the uncalibrated volume near the stopcock of your buret, what was the mass in grams of water that drained out when the meniscus started just above the 25 mL mark and ended just above the stopcock? Report to the thousandth of a gram.