A sextant<span> is a </span>doubly reflecting navigation instrument<span> that measures the </span>angular distance<span> between two visible objects. The primary use of a sextant is to measure the angle between an </span>astronomical object<span> and the </span>horizon<span> for the purposes of </span>celestial navigation<span>.
The estimation of this angle, the altitude, is known as </span>sighting<span> or </span>shooting<span> the object, or </span>taking a sight<span>. The angle and the time when it was measured, can be used to calculate a </span>position line<span> on a nautical or aeronautical </span>chart. F<span>or example; sighting the </span>Sun<span> at </span>noon <span>or </span>Polaris<span> at night (in the Northern Hemisphere) to estimate </span>latitude<span>. Sighting the height of a landmark can give a measure of </span>distance off<span> and held horizontally.
A sextant can measure angles between objects for a </span>position on a chart.<span> A sextant can also be used to measure the </span>lunar distance<span> between the moon and another celestial object (such as a star or planet) in order to determine </span>Greenwich Mean Time<span> and hence </span>longitude<span>.
Hope this helps!
<em>~ ShadowXReaper069</em></span>
I hope this helps you
b (4b+19)
Answer:
D.) 4 1/20
Step-by-step explanation:
2 1/4 * 9/5
Change 2 1/4 to an improper fraction
4*2+1 = 9/4
9/4 * 9/5
Multiply straight across the numerators and then straight across the denominators
9 * 9 = 81 4 * 5 = 20
81/20
Change this back into a mixed number
81 divided by 20 = 4 1/20
Answer:
498
Step-by-step explanation:
6 × 83
Using distiributive property
We can solve the expression by using a method called decomposing the multiplier.
= 6 × (80 + 3)
= 6 × 80 + 6 × 3
= 480 + 18
= 498
6-4.7=1.3
7.3-6=1.3
8.6-7.3=1.3
.
.
.
d=1.3
-------------------------------------------------
a1=4.7
a2=a1+(n-1)d
6=4.7+1d→d=1.3
