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3 years ago

Help,anyone can help me do quetion a and b.

Mathematics

1 answer:

max2010maxim [7]3 years ago

5 0

it's a diamond and 120% heat yatyat Efren Reyes bata

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While taking a ride in a hot air balloon in Napa Valley, Francisco wonders how high he is.

laiz [17]

<span>let landmark be at L
ZN = 100, NL = x (say)
tan 54 = (100+x)/H
100 + x = H tan 54 -------------- (1)
------------------------------
tan 61 = H/x ................ [alternate angle]
x = H cot 61 ------------------------- (2)
put x from (2) into (1)
H cot 61 + 100 = H tan 54
H = 100 / [tan 54 -cot 61]
H = 100 / [1.376 - 0.554]
H = 121.65 feet</span><span>
</span>

8 0

3 years ago

A rock is in the shape of a sphere with a radius of 5.08 centimeters. The rock has a density of 5.5 grams per cubic centimeter.

SIZIF [17.4K]

The mass of the rock is 3020.27 grams , if a rock is in the shape of a sphere with a radius of 5.08 centimeters and the rock has a density of 5.5 grams per cubic centimeter,

Step-by-step explanation:

The given is,

Radius of the rock is 5.08 cm (Sphere)

Density of rock 5.5 grams per cubic centimeters

Step:1

Formula for volume of sphere,

$Volume, V= \frac{4}{3} \pi r^{3}$ ..........................(1)

Where, r - Radius of sphere

From the given values,

r = 5.08 cm

Equation (1) becomes,

$V= \frac{4}{3} \pi (5.08)^{3}$

$V= \frac{4}{3} (3.1415) (5.08)^{3}$

$= \frac{4}{3} (3.1415) (131.097)$

V = 549.14 cubic centimeters

Step:2

Mass of rock = Volume of rock × Density of rock

= 549.14 × 5.5 ( ∵ $cm^{3} (\frac{ gram}{cm^{3}} ) = gram$ )

= 3020.27 grams

Mass of the rock = 3020.27 grams

Result:

The mass of the rock is 3020.27 grams , if a rock is in the shape of a sphere with a radius of 5.08 centimeters and the rock has a density of 5.5 grams per cubic centimeter,

6 0

3 years ago

A3 -4a2+12-3a Factorise ?

Morgarella [4.7K]

STEP-BY-STEP SOLUTION:

= a^3 - 4a^2 + 12 - 3a

= a^2 ( a - 4 ) + 3 ( 4 - a )

= a^2 ( a - 4 ) - 3 ( a - 4 )

= ( a - 4 ) ( a^2 - 3 )

Please mark as brainliest if you found this helpful! : )
Thank you <3

8 0

3 years ago

Read 2 more answers

Please solve 6/2(2x1)=x

bogdanovich [222]

Its x=6
I’m sure
Good luck

6 0

3 years ago

Find the gradient of the line joining the points P(2,5) and Q(4,-2).

liq [111]

Answer is -7/2

Gradient or slope is found by change in y over change in x.
Or
(y2 - y1) over (x2 - x1)

So
(-2 -5) over (4-2)
= -7/2

6 0