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3 years ago

Round 89678 to the nearest ten thousand

Mathematics

2 answers:

DochEvi [55]3 years ago

8 0

90000 because 9 rounds up to 10, and so 89 rounds up to 90.

Misha Larkins [42]3 years ago

3 0

100,000 be 8 is closest to 10. 1-4 you round down. 5-10 you round up

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What is the value of y?<br> A) 130°<br> B) 65°<br> C) 50°<br> D) 25°

Lera25 [3.4K]

Answer:

Step-by-step explanation:

180-130=50

180-50=130

130:2=65

4 0

3 years ago

In the right ΔABC, AN is the altitude to the hypotenuse. Find BN, AN, and AC, if AB=2√5 in and NC= 1 in.

kipiarov [429]

Answer:

$BN=4\ \text{in}$

$AN=2\ \text{in}$

$AC=\sqrt{5}\ \text{in}$

Step-by-step explanation:

Let $BN=x$

$BC=c$

$NC=y=1\ \text{in}$

$AB=a=2\sqrt{5}\ \text{in}$

$AC=b$

We have the relation

$\dfrac{BC}{AB}=\dfrac{AB}{BN}\\\Rightarrow \dfrac{c}{a}=\dfrac{a}{x}\\\Rightarrow c=\dfrac{a^2}{x}\\\Rightarrow x+1=\dfrac{a^2}{x}\\\Rightarrow x^2+x=20\\\Rightarrow x^2+x-20=0\\\Rightarrow x=\frac{-1\pm \sqrt{1^2-4\times 1\times \left(-20\right)}}{2\times 1}\\\Rightarrow x=4,-5$

$\boldsymbol{BN=4\ \text{in}}$

$h=\sqrt{a^2-x^2}\\\Rightarrow h=\sqrt{(2\sqrt{5})^2-4^2}\\\Rightarrow h=2\ \text{in}$

$\boldsymbol{AN=2\ \text{in}}$

$b=\sqrt{h^2+y^2}\\\Rightarrow b=\sqrt{2^2+1^2}\\\Rightarrow b=\sqrt{5}\ \text{in}$

$\boldsymbol{AC=\sqrt{5}\ \text{in}}$

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3 years ago

A teacher is comparing the test scores of two classes. The range of class 1 is 14, and the interquartile range is 7. The range

dusya [7]

Answer:

Step-by-step explanation:

classs 1, because higher number has a better chance of giving higher number

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2 years ago

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Galina-37 [17]

Answer:

I solved part a

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PART C

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We are given an exponential function, for the amount of infected trees f(x) after x years.To find the amount years needed for the number of infected trees to reach x, we find the inverse function, applying the natural logarithm.

Step-by-step explanation:

mark me brainliest!!

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2 years ago

Equation of a line through (-1,-10) which is parallel to the line y=4x+3 has (need the slope and y intercept ) please help

valina [46]

Parallel lines have the same slope but different y intercepts

Slope: 4
y=4x+b
this is the new equation, plug in the point
-10=4(-1)+B
-10=-4+B
add 4
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Y intercept= -6
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8 0

3 years ago