Is there a way to force the default answer format to be in decimal instead of funky fractions, requiring use of the "change" key?

I changed my EL-W516X to display decimals instead of fractions by changing it to Line View: Press 2ND F -> MATH (for SET UP) -> 2: EDITOR -> 1: LINE.

I can save mathematical formulas and equations in the calculator memory?

You can store four formulas in F1, F2, F3, F4. I have stored the quadratic formulas and the vertex formulas for a parabola, -B/2A, (4AC-B^2)/4A.

I bought this calculator but upon opening the package I found that the calculator wasn't coming on. Does anybody know how this can be fixed?

Before you return, try resting it by a window to charge the solar cells. I have found that if I don't use it for a while it may not come on until it gets a few minutes "in the sun". I think that it should not do that but after 10-15 minutes it was functioning, and for weeks.

Is this an rpn calculator? similar to hp35s

This Calculator (Sharp EL-W516TBSL) does not have RPN abilities. I don't know/ heard of a Sharp calculator having RPN abilities just HP's as of now. I have played and own different types of HP RPN calculators including HP35s, I think RPN is pretty cool and fun to use. I do have an older ver/ model of this Sharp calculator and does not have RPN. Hope this helps

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Sharp EL-W516TBSL Advanced Scientific Calculator with WriteView™ 4 Line Display & Solar Power

Sharp EL-W516TBSL Advanced Scientific Calculator with WriteView™ 4 Line Display & Solar Power

Product ID: 42260609

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Details

Brand
Sharp
Color
Black and
Calculator Type
Power Source
Solar Powered
Model Name
EL W516TBSL

⚡Twin-power solar + battery backup

📊640 advanced scientific functions

🔢16-digit, 4-line WriteView display

Description

🔬 Elevate your calculations with precision and style — never miss a formula!

640 FUNCTIONS 7 MODES - Master everything from algebra to calculus with versatile, professional-grade tools.
INSTANT RESET HOME KEY - Start fresh from any screen—no more fumbling through menus.
POWER THAT NEVER QUITS - Solar-powered with battery backup ensures nonstop performance anywhere.
SLEEK DURABLE DESIGN - Matte black finish with silver accents for a sophisticated, executive look.
CRYSTAL CLEAR WRITE VIEW DISPLAY - See calculations exactly as in textbooks for flawless accuracy.

The Sharp EL-W516TBSL is a professional-grade scientific calculator featuring a 16-digit, 4-line WriteView LCD display that shows calculations as they appear in textbooks. It offers 640 functions across 7 modes including algebra, calculus, and statistics, powered by reliable twin solar and battery energy. Its durable matte black and silver design complements any professional setting, making it ideal for students and managers who demand accuracy and style.

Specifications

Display Type	LCD
Compatible Devices	Most devices with necessary input and display capabilities (e.g., computers, laptops, calculators)
Power Source	Solar Powered
Calculator Type	Engineering/Scientific
Item Dimensions L x W	6.6"L x 3.1"W
Material	Plastic
Color	Black and Silver

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