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3 years ago

Round 7.8652 to 2 decimal places.

Mathematics

2 answers:

vekshin13 years ago

8 0

Answer:

7.87

Step-by-step explanation:

Salsk061 [2.6K]3 years ago

6 0

Answer:

7.87?

Step-by-step explanation:

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Please help me to get the answers please its important

IrinaK [193]

Answer:

Q16a: 432 cm³

Q16b: sides: 20 m, 6 m; height: 13 m.

Step-by-step explanation:

Each cube will have a volume ...

V = s³

V = (6 cm)³ = 216 cm³

The two cubes together will have a volume that is twice that.

The cuboid volume is 432 cm³.

Let h represent the height of the trapezium. Then its area is ...

A = 1/2(b1 +b2)h

169 = 1/2((h +7) +(h -7))h = 1/2(2h²) = h²

h = √169 = 13 . . . . . distance between the parallel sides

The side lengths are h+7 = 20 m and h-7 = 6 m. The distance between them is 13 m.

5 0

3 years ago

The worldwide number (in millions) of a particular phone sold can be approximated by the function f(x) = - 879 + 404 Inx, where

Nimfa-mama [501]

Answer:

(a) 157 million

(b) 2018

Step-by-step explanation:

(a) Since x=11 corresponds to the year 2011, we presume that x is 'years after 2000', and that for 2013, we need to use x=13.

f(13) = -879 +404·ln(13) ≈ 157.24

About 157 million phones were sold in 2013.

(b) To find the year that sales exceeded 275 million, we solve ...

f(x) = 275

-879 +404·ln(x) = 275

404·ln(x) = 1154

ln(x) = 1154/404

x = e^(1154/404) ≈ 17.399

Sales will first exceed 275 million in 2017. The first full year in which sales are over 275 million is 2018.

6 0

3 years ago

a clock is constructed using a regular polygon with 60 sides. the polygon rotates every minute. how much has the polygon rotated

Ierofanga [76]

The answer to this question is 42°

8 0

4 years ago

Raise the quality in parentheses to the indicated exponent, and simplify the resulting expression with positive exponents.

finlep [7]

For this case we have the following expression:

$(\frac {-27x ^ 0 * y ^ {- 2}} {54x ^ {- 5} * y ^ {- 4}}) ^ {- 2} =$

By definition we have to:

$a^0 = 1$

So:

$(\frac {-27y ^ {- 2}} {54x ^ {- 5} * y ^ {- 4}}) ^ {- 2} =$

Simplifying:

$(\frac {-y ^ {- 2}} {2x ^ {- 5} * y ^ {- 4}}) ^ {- 2} =$

By definition of power properties we have to:

$(a ^ n) ^ m = a ^ {n * m}$

So, rewriting the expression we have:

$(-1)^{-2}\frac{-y^{-2*-2}}{2^{-2}*x^{-5*-2}*y^{-4*-2}}=\\\frac{1}{(-1)^2}*\frac{-y^{4}}{2^{-2}x^{10}*y^{8}}=$

SImplifying:

$+1*\frac{y^{4-8}}{2^{-2}x^{10}}=\\\frac{y^{-4}}{2^{-2}x^{10}}=\\\frac{2^2}{x^{10}y^{4}}$

Answer:

$\frac{4}{x^{10}y^{4}}$

8 0

4 years ago

The data set represents the total number of tuba players in each of 11 different school bands. 0, 1, 3, 3, 4, 4, 4, 5, 6, 6, 8 W

DaniilM [7]

Data set: <span>0, 1, 3, 3, 4, 4, 4, 5, 6, 6, 8

minimum : 0
1st quartile: 2
median: 4
3rd quartile: 6
maximum: 8

mean: 4
mean average deviation: 1.64
interquartile range: 4
range: 8</span>

4 0

4 years ago

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