Answer:
10 cm
Step-by-step explanation:
Given:
No. of small spherical bulb = 1,000
radius (r) of smaller bulbs = 1 cm
Required:
radius of the bigger bulb
SOLUTION:
The following equation represents the relationship of the volume of the smaller and bigger bulb,
Where,
= volume of bigger bulb
= volume of smaller bulb
1,000 is the number of smaller bulbs melted to form the bigger bulb.
Volume of a sphere is given as, ⁴/3πr³
Therefore:
= ⁴/3*π*r³ = 4πr³/3
= ⁴/3*πr³ = ⁴/3*π*(1)³ = ⁴/3π*1 = 4π/3
Plug the above values into the equation below:
(12pie cancels 12 pie)
(taking the cube root of each side)
Radius of the bigger bulb = 10 cm
It is 20%. Assume Josh is 100000 and Jeff is 125000
The formula is (Jeff- Josh)/Jeff * 100 = (25000)/100000 *100 = 20%
Jonathan and Seth both took 2 minutes to swim each of their laps.
<span>If the radius of a molybdenum atom is 136pm, the diameter would be 272pm. 1pm is 1e^-9 of a mm. Therefore, 1mm is 1,000,000,000pm so 1.3mm is 1,300,000,000pm and 1,300,000,000pm/272pm is 4,779,412. So it would take that many molybdenum atoms laying side by side to span a distanc eof 1.3mm
</span>
Answer:
Option D. 5890.5 feet²
Step-by-step explanation:
An individual head of a sprinkler system covers a circular are of grass with a radius of 25 feet.
Yard has three sprinkler heads that each cover circular area with no overlap.
We have to calculate the approximate area watered by these 3 sprinkler heads.
Area covered by one sprinkler = π×r² = π×(25)² = 625π feet²
Therefore area covered by three sprinkler heads = 3 × 625π = 5892.85 feet²
which matches the approximate value of Option D. 5890.5 feet²
