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Anon25 [30]
3 years ago
7

What’s the scientific notation on -0.00346

Mathematics
1 answer:
NeTakaya3 years ago
4 0
3.....................
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Jimmy wants to order pizza for the birthday party on Thursday each pizza has four slices if the eight kids at the party each eat
blagie [28]

Answer: 14 Pizzas

2 pizzas means each kid gets one

so 7 times 2 is 14 so I beleive the answer is 14


8 0
3 years ago
Use a half-angle identity to find the exact value of tan 22.5°.
dusya [7]

Answer:

\sqrt{2} -1

Step-by-step explanation:

22.5 degrees is half of 45 degrees (special angle for which we know exactly the value of all three basic trigonometric functions (sine, cosine, and tangent).

So we start recalling the formula for tangent of a half angle: tan(\frac{\alpha }{2} )= \frac{1-cos(\alpha) }{sin(\alpha) }

We need just the values of:

sin(\alpha )=sin(45^o)=\frac{\sqrt{2} }{2}

and of

cos(\alpha )=cos(45^o)=\frac{\sqrt{2} }{2}

to answer the question. Then, we use those values in the original formula for tangent of a half angle:

tan(\frac{\alpha }{2} )= \frac{1-cos(\alpha) }{sin(\alpha) }\\tan(22.5^o)=\frac{1-\frac{\sqrt{2} }{2} }{\frac{\sqrt{2} }{2}} =\frac{2-\sqrt{2} }{\sqrt{2} } =\frac{2\sqrt{2}-2 }{2} =\sqrt{2} -1

3 0
3 years ago
Read 2 more answers
Help please, I need it!!!!!!!!
Vadim26 [7]

Answer:

12+ (-6) + (-2)

Step-by-step explanation:

Take the amount of money she started with and subtract the purchases

12 - 6 -2

If we want to use addition, add the opposite

12+ (-6) + (-2)

3 0
3 years ago
1. Graph the function y= 2/x. Draw a chart to show at least four ordered pairs that are on the graph.
blsea [12.9K]
Y = 2/x

x must not have the value of 0 because x is used as a denominator. 
A denominator must not have a value of 0 because the overall value of the fraction is undefined.

x may be any positive or negative integer.

x = 1
y = 2/1 = 2 ⇒ (1,2)

x = 2
y = 2/2 = 1 ⇒ (2,1)

x = 3
y = 2/3 = 0.67 ⇒ (3, 2/3)

x = -1 
y = 2/-1 = -2 ⇒ (-1,-2)

x = -2
y = 2/-2 = -1 ⇒ (-2, -1)

x = -3 
y = 2/-3 or -0.67 ⇒ (-3, -2/3)



7 0
3 years ago
A farmer owns 42 acres of land, of the 42 acres, only 85% can be farmed. How many acres are available for farming?
My name is Ann [436]
Answer: 35.7

How?

Simple. An easy trick I use is by dividing the number by 100, and multiplying by the percent. 

So 42/100 x 85 = 35.7
7 0
3 years ago
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